Had A Miscarriage. Have Minor Spotting, Cramps Constantly. Done CAT Scan. Is It A Cyst Or A Fibroid?

Hi-I live in Dubai but am back in the US visiting family. While in Dubai, I'm sure I got pregnant and had a miscarriage. I couldn't see a doctor about it, it's illegal to have a child if unmarried in Dubai.SO here I am in the states. It's bee three weeks since the miscarriage took place. I've had minor spotting since then, and the cramps weren't as bad as those first few days. I noticed a pain that wasn't going away. When I looked online, it was exactly where my fallopian tubes/cervix are. It's a constant pain that has been growing since yesterday and got so painful that I went to the hospital. The doctor seemed more worried about the fact that I could have appendicitis than the whole pregnancy/miscarriage itself. She decided to do a cat scan. Four hours later, I was released from the hospital with a sheet that said "lower abdominal pain, follow up with a doctor in three days". I asked the doctor at the hospital...is there a cyst, maybe a fibroid, maybe infection, maybe I'm not healing up properly. SHe looked at me as if I was crazy every time I talked about the miscarriage. She said she would have to do an ultrasound to find those but that the cat scan didn't show anything, and the blood work said no inflammation or pregnancy. SHe mentioned that it could be irritable bowel syndrome, since I also mentioned that I had hemmorhoids that started yesterday. I have had that before and I remember it being much higher up than my vaginal area. I'm not looking to be sick. I'm aware of my body and I know this isn't normal. Are cat-scans as accurate as ultra sounds when it comes to miscarriages? COuld she have missed something or am I going crazy? Many thanks--Jillian