So what will happen?

1. My periods are hell. I cramp badly for at least the first 4 days (my periods are 7 days). I bleed heavily, it's as if the flood gates have seriously opened and refuses to close(Please note that I am 5'1 weighing about 120).  My butthole hurts terribly and I get constipated that whole week. And I get (what I call) blood clots badly. It's as if every time they come out it seems similar to after birth ( not that I have actual experience in giving birth or anything).

2. I have had my periods since I was in 5th grade. I am now 18.

3. I will soon be getting birth control (FINNALY). Yes, will finally be getting the pill😁. I am excited and relieved because I hear it's supposed to help you with  periods making them less like hell 😂. But what all does it do?? I hear you could gain weight and get bad acne. Are there other side effects I should be aware of? Or does it really depend on the pill and the person?