Hormones or not, you need to stop taking it out on him (I'm 33 weeks pregnant) my sex drive has been from intense (waking him up at 2, 4, 6 in the morning, sometimes he says yes, sometimes no, but I never get moody or angry over sex, that's not fair or nice) to nothing at all and feeling like a terrible manky whale (like right now!) lol.
You can't use your homones/pregnancy as an "excuse" when you know exactly why you are being horrible and snappy with him.
Like Cog said - if you can't control it yourself, you need to see a doc if it's becoming obsessive. If you can, and you're well aware of your behaviour (which you seem to be) you need to start thinking before you act and not get angry at him over sex.
If this was a man it wouldn't matter what his reasons were for "needing" that much sex, can't treat a partner that way, especially if he still wants to be intimate with you and cuddle.
We all give our partners a hard time when we're pregnant, so it's good he's being patient xx