Jenn, I think the questions are normal.  My husband had an emotional affair during his last MDE.  My husband & I both read the book "Not Just Friends."  One thing it suggested was to actually write down any questions you think of concerning your partners affair & have an agreed on time to discuss them...I'm not sure how often the book suggested, but my husband & I talked about & he answered all of my questions once a day.  In the beginning, there were a lot of questions.  Gradually, the questions decreased.  This seemed to really help me.  I didn't bring the questions up or comment at times when I shouldn't...like when my husband was making a true effort with me or when we were discussing/arguing about other issues.  I got my questions answered so that I didn't keep obsessing over them or imagine the worst.  The answers were hard to hear at times & I know hard to answer but very helpful.  I don't have any lingering questions or doubts anymore.  We have put this behind us.  As I've told my husband, I forgive him, but I will never forget it happened.