I'm bleeding, 5 postive tests!

I took 4 pregnancy tests, all positive. I went to my doctor and they all did a urine test and positive. They did a blood test and, positive.

3 days later, I had sex with my husband, 12 hours later, I'm bleeding. Due to the bleeding, i rushed to the hospital, and they said I'm not pregnant, and maybe not pregnant at all. So my doctor said, I had a miscarriage, based on the hospital results. But she didn't do a urine test or blood test to confirm themselves. I still have hope i might be pregnant.