1 go see your doctor ?

But what pills? bleeding, do you mean your period, or blood in your stool, or did you cut yourself.

A little detail would be great

What pills are you talking about? (birth control pills) how are you bleeding so quickly, because it shouldn't bleed that quickly, and if your talking about your period started then you should so see a doctor because when your on a pill, it stops your periods(sometimes). When I was on the pills I had slight bleeding, but its wasn't a lot of bleeding. Did you just start taking birth control pills?