Thank you for that, it puts a bit more light on this.
So there was an affair in the office, but it wasn't you! Your husband has been given some bad information.
It sounds like your husband is using that as an excuse for his own behaviour, even though it is untrue that you were unfaithful.
I just don't understand what motivates him to run with false information, and not even talk to you about it. Especially when everything was fine at home; he wont' even give you the benefit of the doubt. I wish I had some sense of what's going on with him, but I'm just as baffled as you are.
I hope you will post again when he does call you. If you can find out where he is, maybe confront him about what's going on.
From what you've said, I do hope some answers are coming soon.