HUGS.

I'm sorry your mom didn't react well. I hope your dad is less reactionary about it (if you choose to tell him).

Our parents should be supportive even if they are shocked/confused/etc. A simple "I'm sorry this happened, can I ask questions?" would have been nice, wouldn't it?

There is no way I am ever coming out bipolar to my parents. It wouldn't be helpful to me. It would end up being all about them, and nothing about supporting me.