My gf had her periods on dec 24 and we dry humped a couple of times. My jeans got soaked while I was on top of her. She wore pajama pants and underwear and i'm wearing underwear and jeans. Since january she is not having periods. She's 5 days late for february periods too. She's having white discharge, mood swings, headaches, sometimes one side of the head, got negative on pregnancy test taken on feb 23. Why is she not having periods till now and having only symptoms. 1. Is she pregnant? 2. Why is she not having her periods for 2 months for now? 3. Is it due to any hormonal imbalance or other?