What would you do...?

I have been in your shoes before, needless to say i am going thru a divorce of a 7 yr marriage now. I know you are not going to want to hear this, but he more than likely had intentions of cheating on you with his co-worker, and it is posiable that he did. you need to make decisions for you and your child, and take yourself out of a place where you are constanly wondering!