Hi, my name is Ashley. Since the 28th I have been having sharp pains in my uterus, it is very uncomfortable. Following this are symptoms of: lightheadedness, hot flashes, nausea, headaches, iron tasting in my mouth, I urinate more frequently and I always feel like I'm hungry. I also had an abnormal period, light spotting, no cramps or any other signs of a period. What could this be?.. I also had a pregnancy test come back negative on Friday.