I'm sorry that you're struggling (((Leafeon)))
I feel your pain.
When I was pregnant with my daughter my BP symptoms were out of control (I'm not for one second suggesting that yours are) - and as a result it caused undue strain on my marriage.
I was actually undiagnosed so yeah it was all confusing.
Every day felt like emotional hell.
Fortunately after my daughter was born I was put on some meds (I was diagnosed with depression - prior hypomania episodes were not picked up on).
And things slowly began to heal.
I hope that with time and education, your husband can begin to separate the "you" from the symptoms of Bipolar that he may occassionally see.
Just know that there is hope out there!
And it's good to see you on this Forum. I look forward to seeing you here more often. We're all here to listen.
Take care.