Has this happened to anyone? I'm two months late for my period but I took a pregnancy test today and it came back negative. I'm only 21 so I know it's not menopause. I'm not under any stress really and I wasn't expecting to get pregnant so I don't think it's a mental thing. Lately I've been dizzy, had nausea, my nipples have been killing me. I know that these could be symptoms of PMS too but so far no period. I DO HAVE AN APPOINTMENT with my ob/gyn so please don't yell at me for not going to the doctor. I was just wondering if anyone has had a similar experience or knows (aside from pregnancy) what I should as my dr. about. PS. I'm NOT on any meds, my thyroid is fine (had it checked a couple months back) No eating disorders, I'm average weight, and haven't been on birth control in 3 years. Normally my periods are right on time. What gives?

Summarized question: What, other than pregnancy, could cause an irregular period in a young woman?