I just have to tell you a story. I hope this isn't too long.
My daughter was pregnant with her second child and she was just a few weeks/months. Not far along at all. She called me at work and told me to meet her at the ER, she was having a miscarriage. I met her there and there was blood everywhere, clots, tissue, some little thing that looked like a sea horse with ribs, etc...I was sure it was a miscarriage. Her hormone levels appeared to be dropping from a previous doctors appointment they had on file. She went home and followed the doctors advice about resting and stuff. However, she did not follow through by going to the OB/GYN for final bloodwork. About a month later she again called me at work, very upset, she kept saying that the fetus was still inside and causing her to feel ill and not get well, she was still throwing up, her bobs hurt, and her tummy was still there.... I met her and they kept telling her she must be pregnant again. She kept telling them they were nuts, she hadn't done anything to get pregnant. The lab person came to draw blood for a pregnancy test and my daughter just had a fit and told me to go get that nurse and tell her to do an ultra sound. That would show them, they would see she wasn't pregnant. The nurse came, being rather condescending to her, and when she put the ultra sound on my daughter's tummy her heart rate was about 75, her babies heart rate was about 150. The nurse's jaw dropped and she admitted that if the baby was only a few weeks along the ultra sound wouldn't have picked it up until about 16 weeks. So, my daughter did have a miscarriage, the tissue that went to the lab was a fetus, but the baby's twin was still alive and growing.
There are many medical things that can be going on, have faith and just be calm. What is going to happen will happen. Good luck.