Medroxyprogesterone
birth control
"Depo shot:
I want to start of by saying that I know birth control affects everyone differently. But I also feel that many girls aren't truly warned about the side affects. Before receiving the 3 month depo shot I had to sign a form for bone loss. But I did not have to sign a form about all the side effects that plagued me while on this shot, and for months after.
An hour after receiving the depot shot I experienced my first panic attack. Extreme fear, nausea, choking, sweating all out of nowhere. Then it happened again several hours later. I took the shot only once. It's been six months since I received the shot and I'm now having another panic attack. No one actually tells you that the depot shot remains in your system for up to 18 months.
This doesn't even come close to the worst of it.
A month after my depo shot I started my period. My period went from July to October NONSTOP. Continual flow, every day, for five months. It finally stopped when I ate a bunch of fresh ground flax seeds (they have estrogen in them, which helps repair uterine lining - depo is progesterone which thins the uterine lining). 
I only received one shot and my life has been affected for six months and counting.
It's amazing that my relationship survived the depot shot. I had/have an amazing man by my side who knew none of this was my fault and supported me the whole way. But I truly could not have judged him if he left - depo was horrible for our relationship.
Please, please decide if these risks are worth it before you take this shot. You can't remove it from your body, but you can stop taking the pill if you react negatively."