Sorry if this is a silly question but if your 'cycle' is being determined by the pill can you tell? (if there's a thread covering this please link, I couldn't spot one that asked this question exactly).
I'm 51 and the pill suits me - keeps the horrendous acne of PCOS at bay. So I don't want to stop before I really have to. I get a flushed face sometimes - esp when cooking - but I've had that for ages anyway because of rosacea.
My DM went through the change at 56, don't know if/to what extent its a heritable trait.