I don't always think that sex drive is such a big thing. It could be if it is Bipolar 1. Less so if it's Bipolar 2 where it's hypomania.

But sexuality is a complex thing and I know a lot of people who are Asexual and don't have Bipolar. I think sexuality and Bipolar, in that case, are unrelated. Basically, if you just never have/had a sex drive, I would find it very unlikely for it to randomly appear during episodes.

There's a lot of different factors for being Bipolar. Your pdoc should examine a lot of the other factors and not single out only one. Not every Bipolar person always has 100% of the same symptoms.