Hi W2BH.,
I am sorry that you are going through this anxiety with your relationship right now.;( I know how interpersonal conflict can raise anxiety levels.
I will not get into the details of your trust issues, as that is a personal thing that you will ultimately have to work out between the two of you...
...however, I would encourage you to do the best thing for yourself, which is keep your anxiety at a healthy level.:)
We have self help ideas here in our Resources which serve a double purpose.
For one, they naturally lower stress levels through mental and phsyiological methods...
...and they will also help to distract you from worrying about
this issue constantly.
Give these a try and see how you feel.
http://www.healthcentral.com/anxiety/c/73076/34334/breathing-lessons/
http://www.healthyplace.com/
http://www.stress-relief-exercises.com/
I wish you well in your relationship. I hope that everything works out for the best for you.
Post anytime,
Scaredy Cat