I'm 35.
Pre-children my cycles were around 26 days.
After child 1, and 2 miscarriages, they shortened to 22 days. After child 2 they were anywhere between 22 and 25 days but mostly around the 23 day mark. Last 3 cycles they have been 22, 22 and 21 days.
Not fun. Is there any point in visiting a GP or is this something I have to grin and bear?