I went to the doctors because I had bleeding for a month and the doctor said she wanted to give me a pregnancy test it came back negative she sent me for a blood test and it came back positive I went for a ultrasound and nothing showed after that my doctor asked me to go have a hcg quantative, the first one came back at about 180 and she sent me for another one the next one came at 350 and then my levels dropped to 170 with the next.. does anybody know what could be happening?