I was on 17 day cycles for a year since I stopped depo injections. Today I’m on cycle day 33 AF has not shown. Have been cramping on and off for the last 10 days, it’s like my periods will just start now. I have done home pregnancy test and it’s negative. Am I going through early menopause at 31 years. Anyone experienced this at all, I’m so worried it’s PCOS, cysts or endometriosis