How can I get birth control without my parents knowing?

Im 17 and my mom would kill me if i asked her to go on the pill. Honestly I would just feel a lot safer having sex on the pill and with a condom (im super paranoid). Also it would be more comfortable if we didn't wear a condom. And not to mention my periods don't come on a normal cycle and when they do come its actual hell: I'm vomiting, somehow diarrhea combines with constipation, my cramps are so bad I can't get out of bed I get fevers, but the good thing is that it only lasts 3 days so... Anyways, is there a way I can get on the pill without my parents knowing?