From what you have posted your sitch sounds similar to mine.
I contacted OW and regretted it. It made me feel she had won in a way as she knew she had gotten to me. When my M was back on track, it contacting her let her know that I had a problem, as I was obviously obsessing about her if I felt the need to contact her.
I wanted an apology I guess - but that wasn't going to happen. If she had a conscience she wouldn't have entered into an A with a M'd man in the first place.
You will go through times of doubt etc....but it does get better. My H is also 100% transparent and he tries to make sure he keeps me informed of all his movements so I don't panic. Sometimes he forgets but his heart is definitely in the right place.
I am glad it is working out for you.....don't let yout thoughts in your head ruin it - it is so easy to do that.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength