Ovulation after miscarriage.

Gina
Hello everybody.
I found out I had a miscarriage one week ago today after starting to bleed nearly 2 weeks ago, we've checked and my HCG levels are zero, my doctor said it can take a while to start ovulation again (about 6 weeks) however I had a spare ovulation test and I also had some discharge so decided to take the test out of curiosity and this was my result, is it possible I've started to ovulate so quickly after?