I'm so sorry you are having to live with this uncertainty. It is so so painful. I just wish they could understand that the emotional toll that this takes on us is probably the worst part. ((((amberdawn))))
In most cases we need to trust our guts. I think it is highly unlikely that it was 'just' an EA and texting. And I think one of the big tip offs to that is that it took you so long to admit to it. If it were 'only' text messaging and pics, then why would he not just come clean about it immediately? And, if he had a PA 12 yrs ago, the odds are that this was a PA also.
There are some things you could do to find more info:
Hang in there.
Edited b/c I just realized what forum I was in.
Amber dawn I will message you.