Yep. Your GP is out of date.
There is no such thing as early menopause . Girls can have 1 period and then nothing else, some don't ever have a bleed. Periods vary and some ladies may get to The Change from late 30s though there is a mean age of 52 [I think]. There is the daisy web-site for early menopause as well as advice here.
Some find keeping a mood/food/symptom diary useful. Browse round. Make notes.
How are your periods? Confusion is 'normal'
we have a thread 'doing stupid things'
and discuss most topics even menopause ;-).
Do you have a Practice Nurse, maybe ask for a well woman check. Blood pressure, weight, general talk about diet and exercise as well as menopause. HRT can protect heart and bones and do read the threads on vaginal atrophy
Ask away!