Excessive urination

Hey guys so I need some help, for those of you girls with small bladders.

Backstory, I genetically was gifted with a tiny bladder. I ALWAYS have to pee. Not to mention I believe I have mild IC because I can’t seem to handle caffeine or dairy. I’ve been tested for UTIs frequently and I’m always clear!

The past week and a half I’ve been peeing A TON- more than usual. No pain, no burning, just a lot of fluid. And I’m not even drinking that much! However, maybe two weeks ago I started taking extra strength biotin and it had a lot of other stuff in it like vitamin C, iron, and a long list of other things. Could this just be the excess vitamins leaving my body? I stopped it two days ago just in case.

Could it also be hormonal??? Not sure where to turn, doctor says it’s normal and sometimes we just go through periods where we pee a lot.