Hi Susan99. You've come to the right place for understanding and advice.
You are considered post menopausal when you have gone one year without periods. Any bleeding after a year without needs to be reported to the GP for investigation. As your last bleed was May 2021 then as CLKD says you need to begin counting the months again. Lots of us have had long gaps between periods. I had a nine month gap twice before I started HRT at age 53. When on HRT you don't know when you are post meno due to the induced bleeds caused by progesterone withdrawal each month.
I hope this has reassured you.
Taz x
