Hi guys. I'm 19. Ever since I got my period at age 12, I've been regular...28-30 day cycles, no surprises. But it's now May 3 and I haven't had a period since February 14....and I'm a bit worried. I've been sexually active, but have only had oral sex, no vaginal sex. Any ideas what it could be? I'm on Prozac for anxiety/depression, but my doc said it shouldn't affect my menstrual cycle. Thoughts?