I'm 20 years old, perfect health except for the odd migraine, I was only on the shot for 6 months (two injections) I had to come off the injections because the migraines were getting worse and more frequent. I got my last shot 13 months ago, I've been to the doctor to check my hormone levels and they're normal, but I've had no signs of getting a period since first getting the injection. Has this happened to anyone else? Thanks for reading!!!