I was supposed to get my period last Monday but instead I started to bleed heavily with clots on Friday. I took a pregnancy test and it came back negative. A large object came out of me on Saturday and I continued to bleed for several days. The blood was mostly bright red. I went to the emergency room on Thursday and they did an ultra sound and didn't see anything but the doctor said it might be too early to see anything. I would be 3 weeks pregnant. The doctor said I should check my levels in a few days because I could still be pregnant. I took two pregnancy tests and they came back positive. Could I still be pregnant or is it a false positive?