I'm sorry you are here. I can relate to some extent. My WH had his affair opener a month before I moved across the country to live with him, fairly early on in our relationship. The fact that he stopped the A for years before she re-initiated it (same AP - who at the time was just a few months post-getting married herself) was not a blessing - I wish he had just gone full steam ahead in the beginning, and that I had caught him then.
You have received good advice - so I will not add much except to address how you are feeling right now, to the extent I can try to relate.
1. Don't get rid of everything you think they may have touched or things you feel like you may regret later, and remember, you can't get rid of everything. For me, when the A started he brought her to our house, they had sex on my couches (when I moved we kept my stuff and got rid of his as mine was nicer), my car, his car, our bed, our guest bed, our shower - you name it, they fucked in it/on it. She petted MY dogs (and the traitors let her ). At the time I wanted to burn the house down, drive our cars off a cliff, and even cold shouldered my dogs (for one night) - I threw away and broke all kinds of stuff to the point I had to leave the house entirely. But later - later I decided to own my stuff - to not let them take it from me - that and I simply could not afford to get rid of everything that they touched. It was impossible. And I regret losing some of those things now (2 things in particular). You are right to not throw away the photos etc right now - but if you can't stomach them around see if you can't box some of that stuff up and let your friend keep it for you for now? Things are just things - they had no part in the choices your WH made - try not to let him ruin more for you (and you can always have a bonfire later if you still want it all gone). Things are fresh - try to be kind to yourself - as hard as that seems.
2. Cheaters seem to oftentimes do things that will hurt them so don't think that any leverage you have over your WH will make him any more honest or remorseful or anything - and wondering why he would potentially harm himself with this behavior is like trying to read the tea leaves. The AP in my world was married to one of my WH's now-former best friends and they all worked together (him, the AP And the OBS) - he was in their wedding FFS. He put not only his job in jeopardy but his and the OBS's jobs too by having the A especially in the way they did - long story but their all have high security clearances and their affair took place like 50% on site at the work place (it would have been 100% but our house was conveniently located less than a mile from their work so who knows how many times they were there and what they did where ) and the relationship they were having is contractual grounds for dismissal immediately - and her poor OBS was required to let management know once he did so they made him complicit in their A too because he did not - such ass_____!! All 3 of them could have lost their retirements and their clearances - any future job prospects would have been significantly hindered - but my WH and the AP did it anyway - for years - and kept going even after I - and subsequently the OBS discovered it.
3. If you want to investigate - do it NOW while he's not there. I guarantee he is in damage control mode, deleting/removing anything and everything he can remotely, but right now your shared space is yours to search without him. Look at credit card bills and access phone accounts. Look for a number that has a lot of texting and other communication that you don't recognize. You can also look at your home router history and a few other free/easy search tools to search what he cannot delete. Use google to find locations where he has been if that is activated. There are a lot of helpful tools on this site for investigation purposes. I was one hell of an investigator and my WH was sloppy - as it sounds like yours is too. Don't be surprised if he shows up early from his trip to "talk" - as I'm sure he's panicking about what is in that house you may have found.
4. Talk to a lawyer about your financial options for all the reasons reiterated here already. You do NOT have to file for divorce right now - but find out what you can do to protect yourself. Your WH may be all apologies right now BUT that may change quickly and you are not a bad person for wanting to protect yourself. Most people should do this sooner.
5. Be kind to yourself. This is NOT your fault. There is nothing that you did that justifies this behavior from him. Nothing.
6. You CANNOT fix him. He may be able to be repaired, but he's going to have to be the one doing the repairing.
7. This is not a marriage problem - this is a HIM-problem. See numbers 5 and 6. If/when he tries to shift the blame to unhappiness in the marriage, problems with you, whatever allegedly "drove" him to behave this way - remember that your marriage did not go out and have an intimate relationship with someone else - he did.
8. Be kind to yourself. I know - I said this already but it bears repeating. You are probably going to say some things you regret. You are likely going to behave in ways you don't recognize. You are likely going to feel like a stranger in your own life. You may forget things, be snappy to others, be judgmental, be cranky, irritated, irrational, lost, confused, etc. It's okay. It WILL pass AND it's unfortunately normal.
9. You will likely change your mind 10000 times about what you want to do, how you want to do it, if you believe him, if you want to leave him, and if you want to stay together - which is all normal too. There is a reason my signature line says what it says.
Hugs from this little corner of the internet - I'm glad you found us and sorry that you had to all at the same time.
I'm sorry you are here - sadly I KNOW this rush of feelings you are having.
[This message edited by ThisIsSoLonely at 10:20 PM, Tuesday, October 18th]