So confused!

I've had severe nausea and vomiting since Tuesday. Yesterday morning (Saturday) I woke up around 2 am to get sick. After, I went to the bathroom and my underwear were covered in blood. I never bled once during my first pregnancy so I was kind of freaking out. I cleaned up then went back to bed. I woke up and i realized that I wasn't nauseous anymore, and I was actually hungry. I then got up and went to the bathroom only to find lots of brown and flaky stuff coming out. At this point I breakdown and start crying. My fiancé had to leave for work, so I told him I was going to the hospital and I would let him know what happens. At the ER they took my blood then the ultrasound lady came in and started to scan me and there was still a baby in there with a strong heartbeat! So the then the dr came in and did a pelvic exam and told me that I probably had bacterial vaginosis. When all the results finally came back I was negative for the infection, but the dr said I have a blood clot in my uterus and that it looks fine for now, but that it could change at any point. This morning I woke up and went to the bathroom and started having the brown flaky stuff again. So I think that I've convinced myself that I was maybe pregnant with twins and I just lost one. I could be completely wrong, but something just doesn't seem right. I have an ultrasound with my dr on Wednesday, so I guess we'll just have to wait and see.