I am a 33 years old insulin-resistant and I am taking Metformin every day. My last period was 28/05/2011, by the end of june I started to feel strange, nauseous, light headed, sore breasts, etc. I decided to take a pregnancy test from the pharmacy and it came out positive. After a few days I felt the same so I took another test and it too came positive. I started to become very excited about the news, when one morning I started to bleed (beginning was red blood with a black clot and then brown blood) this lasted for one day, the next day only a brown thing only when I wiped. I went to the doctor and sent me for a transvaginal ultrasound in which the doctor that took it said that there was nothing to detect. My question is, whats happening, I am pregnant or is it on my mind. Please help.