Laurie, I (along with Lassie) was nodding my head at so many of the things you wrote: No mbation, chalking it up to bad physical shape, the tiredness, afraid of hurting the baby, etc. I mean, who do these guys think they are? Once I showed my H a diagram of the inside of a pregnant woman, showing him where the baby is and where (approximately) HE was during sex. I think I convinced him that he wasn't going to hurt anything but, honestly, that wasn't the problem anyway. He had a hard time getting mentally into it while he was thinking of his child being within inches of his d*ck, and he was also not physically attracted to me while I was pregnant.
The only thing I can say to you is to keep doing what you are doing with him. Continue to talk and, by all means, do not be afraid to tell him the truth and forego the euphemisms. That was hard for me at first and it still is, sometimes. I try to be as honest and forthright as possible but sometimes I feel vagueness creeping in, in some backwards attempt to "protect" him from my true feelings. Bizarre, aint it.
My only other piece of advice about ditching the anger long enough to ML is to have a drink or four. Get yourselves laughing and enjoying each other and then you can break the ice.