I don't suffer from bipolar but I have depression and psychotic episodes. Honestly, pregnancy is like the lottery. I've had two pregnancies and my first, I felt great, came off all my meds and didn't need to go back onto them until my step father and my grandparents both died in the same month, when my daughter was one.
So then I got pregnant again, thinking it'd be the same... nooooo... my depression was severe, I went into psychosis, after the birth I went into psychosis and my depression got bad again...
But then I don't regret at all having my son. I've had a very difficult past few years with my mental health, but things are settling down now and I wouldn't wish I'd never had him because he's lovely.
So I guess what I'm saying, is 'good luck, I hope you have a pregnancy like my first one, but if you don't then you just have to get through it, using all the help you can find, and in a few years things will start to settle down again and it'll all be worth it.'
Your husband sounds good... when you're having an 'episode' then the best thing to do is listen to him, not what your mind is telling you.