
  I would be reporting this Surgery to Dr Currie who runs MM .  Naming and shaming until GPs realise that no one is 'too young'.  Girls may have 1/2 periods then none after, rarely a girl will never menstruate.  That's 'too young'?  
I would send an e-mail to the GP concerned with a copy to the Practice Manager asking for him/her to clarify where he/she has read Peer Reviewed Research that leads him/her to believe that women can 'be too young'?  Might focus the mind a bit.
In the meantime, ring the surgery and ask for a referral to a dedicated menopause clinic.  Not a gynae as they often don't know any more than may GPs seem to!
Itching is usually due to oestrogen levels dropping: inside and out: scalp, deep in the ears, nostrils, eyes, vagina, anus, skin .......... 
Let us know how y ou get on.