Sometimes dr's tests aren't as sensitive as the over the counter ones. I suggest requesting a beta hCG test. Looking for a quantitive number not qualitive.
Were you using first-morning urine at the doctor's also? If not, it might have been too diluted for the hCG to register. Test again tomorrow with a home test.
The clear blue digital is just about the best you can buy OTC at least that is what my doctor said. They had to do a blood test on me bc mine came back positive but theirs didn't.
They should have done a blood test. I would request that to be sure.
I had the same thing happen to me. I had positive tests at home and a negative at the Dr office. I requested a blood test and it came back positive, my level was in the 500s.