I've had a pretty stressful pregnancy too - we were building a house which had huge problems and then had our move into it. Then there was dealing with contractors etc for finishing house stuff that had issues too - to the point where for the first time in my life I actually screamed and swore at someone on the phone. My job was very stressful too but I have been sick the entire way through so I cut my hours right down. I was really lucky in that I could do that both financially and that my employers were very understanding of my situation.

Try and get as much rest as you can, and definitely get your DH taking on a bigger share of the workload. I felt pretty guilty about that at first, but my DH was more than happy to do it to keep me a little more sane and our baby safer. I would also tell your OB - you're not complaining - he should know all this sort of stuff and its his job to deal with it. Hope life settles down a bit for you soon.