Kudos for keeping yourself together, mdu. I'm sure your husband noticed both your anxiety about it and that you didn't go off on him. For the short term, do you have to go to his work at all? You've dipped your toes into H's work pool so I see no harm in avoiding the place until you have the courage to try again and having him meet you elsewhere until you're ready.
Me: 31, W: 29 T: 4 M: 2 Kids: 3 (SS: 7, SD: 4, D: 3) Separated, still living together: Nov 2013 Separate bedrooms: Feb 2014 W working away; kids with me: Nov 2014