Pregnant month after miscarriage

Alison

So I had a complete miscarriage on the 15th August, last period was the 11th July. Now the 10th September no period and I'm getting consistent bfps. My blood put me at 2-3 weeks but the doctor wants me to wait 2 and a half weeks to test again because they could be ghost hormones. Anyone else gotten pregnant after losing a baby without a period between?