M.B.
Hi, C.
I think first you need to cut yourself some slack. Your hormones are crazy when you're pregnant and they are most likely affecting your outlook on everything. A pregnant friend of mine recently became absolutely convinced her husband was having an affair. He wasn't. Luckily, she realized in time and was able to laugh about her paranoia and things are OK.
It's normal for you to be freaked out on so many levels right now. Personally, I would try to limit the work calls to emergencies since that is what he requested. When you're tempted to call, write down what you want to say and see if it can't wait until later (and not the moment he comes in the door - then he might feel bombarded and avoid coming home!). Try asking him to set aside a little time after dinner or after the older kids are in bed for just the two of you to be able to talk, even if it's just a half hour at first.
In my experience, when women are pregnant, we worry about SO many things. My husband, on the other hand, goes into what I call "caveman provider" mode where his focus (obsession?!) becomes providing for the family financially. I want more help and support at home, more emotional availability but he has less time because he's worried about providing for another child and being "the man". He thinks he's doing the very best he can to support the family but it's a different kind of support than I want. lol I think it's just one of those Mars and Venus things.
I think the suggestions of the other ladies to find a moms group or some kind of activity where you can be around other women (who understand) is a great one. Also, make yourself a list of all those nesting things you need to get done and start working on them. Clean out the scary hall closet, work on that scrapbook you've been meaning to do or move those VHS tapes to DVD. Whatever - just so it's something to keep your mind occupied and help the time pass. And cut yourself some slack. Really, your body's not entirely your own right now.
You are not alone. The challenge is to learn to be able to meet more of your own needs (whether by yourself or through female friends) instead of looking to a man (even your dearly beloved) to meet all your needs. That's like going to the hardware store for a loaf of bread. I think men just aren't wired that way.
Best wishes to you!