amenorrhea
"Hi! I'm 18 years old and ever since I've had my first period, it's been irregular. I've even been up to 6 months without it. It's my first time with provera. I got my period two days after 10 days of taking the pill. The only side effects that I have had are that I've sort of had hair loss and frequent headaches. Other than that, I've always had PMS."