I'm supposed to have yearly smears due to having had abnormal cells removed a few years ago.
The surgery ask that you ring up on the first day of your monthly cycle as they then count 12 days and there is a 3 day window to have the smear.
I have done this for 2 months running but haven't been able to get an appointment on any of the 3 days, despite this being over a week in advance.
I'm now overdue and the only answer is to hope that there's a cancellation or to try again next month.