In need of advice!!

Gigi • IVF baby due June 2023
To make a very long story short, I've been ttc for about 9 months, discovered that I ovulate at different times each month and this month, I just started bleeding a week and a half early!! It would be incredible if it was implantation bleeding but I doubt it. Normally my period is like clockwork, around a 31 day cycle. I started bleeding today on cycle day 22....has anyone ever experienced this???