Is your husband in any type of treatment for his bipolar?
I have 3 kids and I have bipolar. It's rough sometimes. I know treatments for fertility is extremely expensive, so not really good to be wishy/washy about it once you're in it. I think since you're still trying, that he needs to get into treatment if he's not. And if he's in treatment he needs to let his doctor/therapist know if he's struggling. If he's very volitile, I don't know if a baby will be such a good thing.