Just Stopped having depo as 49 and didnt have periods for 18 years due to this - had fsh blood results 87.7 dr says post menopause now so 99% not fertile however how do they know 100% - don’t want to be pregnant at 50 !!! Need another fsh result ina few weeks to check but really don’t want to have any more contraception but need to know i won’t get caught?