Ovulation after miscarriage?

I miscarried on the 17th at 10weeks. The bleeding stopped on the 25th (8 days after). I took a pregnancy test on the 25th and it was negative. I started using ovulation tests on the 28th. The lines are now getting lighter than they're before. Could I have ovulated between the 25th and 27th? That seems so soon... Thanks for any help!