i have no words of advice--obviously you have to talk with him when he gets home...i hope you two can get the truth out and figure out what the next step is.
I just saw this, oh no, just reading this made my heart sink into my stomach. I am soooooooooooo sorry you have to deal with this and dont be sorry for going through his account , you went with your gut and you were right. How about you show up where they are suppose to meet. If you need anything please let me know. I am off tomorrow and will be on the computer for awhile.
OMG I am so sorry! My heart is breaking for you right now! You have every right to feel like you do . Losing trust is my biggest thing. You are not alone....We are here for you and I have been there too. Try not to let him make you feel like you did something wrong. I know it's hard but thats why he is trying to turn this into a guilt trip on your part. Sooooo sorry...
I would wait until he gets home. Ask him about it again. When he says "why don't you trust me" that is when you take the printed out evidence outto show him.