Put it into categories:
Current symptoms and how they are affecting you. What you’ve tried and the effects of that.
Menstrual history - when periods started, what they were like, any pregnancies and outcomes. Up to date with smears/mammograms etc or not.
Past medical history - any ongoing diagnoses. Or significant illnesses or hospital stays. Any previous surgeries. Anything you take medication for.
Current medications and any allergies.
Family medical history - strokes, heart disease, diabetes, cancers etc.
Family menstrual history - do you know anything about your mothers or sisters menopause etc,
It’s Ok if you don’t know, many people don’t.
That should cover most of it. But they’ll know what they need to know and won’t mind if you need a bit of prompting!