Pregnancy question

Has anyone had period like bleeding and still ended up pregnant?

So i was having multiple positive pregnancy tests for like 3 days and i hadn't gone to the doctor cause it was the weekend but just yesterday i started bleeding kinda like my period pretty much and pain wise not much very little cramping well i went to the hospital they left me with no answer still they did an ultrasound but no pregnancy showed up and my blood test my blood level was at 7 very low so im pretty sure i had a miscarriage but the doctor said to go back tomorrow and get a blood test to check if my levels are going up or down she said i could have miscarried already, or I could still be pregnant but too early to show or it could be an ectopic pregnancy. So now i gotta wait but im pretty sure its a miscarriage:( it would be an amazing miracle if i was still pregnant..... But has anyone gone through anything like this or similar?