Weird light af

I had a MC om 25th of august at 6 weeks. We were told we could start trying straight away. I ovulated cd 25 which seemed very late. I had heaps of pregnancy symptoms from 12-14dpo then 15 dpo I started bleeding a tiny bit. It turned into very light spotting for 2 days . It was a 40 day cycle.

I had a blood test esterday and it was negative.

Has anyone had very strange AF after a miscarriage?