Should I test again?

Ma

This was my test 3 weeks ago. I was having symptoms of a miscarriage 3 days later, I was passing clots cramping, everything. Called my doctor, got a blood test done. They called me back and told me it came back negative and I wasn’t pregnant. I was apparently having a “really bad period” well the doctor refused a ultrasound since my test didn’t come back positive. Should I retest even if I know it’s going to be negative?