OMG.. you sound like me a long time ago..I had that issue. yes, hubby cheated, I found out, it killed me..Caused me panic attacks..for the longest time I did what you are doing, in fact, I did all those thing when I suspected it, that is how I found out..so of course after he admitted it, I felt so hurt and the scary part was I was second..when I always thought I was first..
He did everything to make it up, he knew he did wrong. he let me know where he was, let me see everything of his, he wanted the trust back...he was very good .. to me to help mak eme feel better but still..for years I was upset. Everything made me panic..
Until one day.. he and I had a very long talk. I told him..how I felt, he was shocked and thought I was over it..the only reason why I wasnt was I didnt know what really happened between him and the homewreaker and yes, he did everything to gain the trust back, but he never said sorry and deflected the blame at the time it happened..so that is what was missing..he and I had a 2 day long talk..everything on the table..after that it pain was gone..knowing what happneed, that he was sorry and that he was wrong for placing blame on something else besides himself made everything alot better.