Please help .
For years now I have suffered with a^^ very itchy scalp. To the point it keeps me awake at night for several hours at night.
I have been to the GP previously and was told "I can't see anything " after she examined my scalp . There are no open sores, no scaling / flaking .
Just this intense itch and burning sensation.
I have tried :
-over the counter shampoos such as Aphosyl which has 5% coal tar extract ,
-the usual head and shoulder type shampoos for dandruff
-phosphate and pharabens free shampoos
- a range of conditioners both wash out and leave in and oils incase the itching was due to scalp dryness
My hair comes out a fair bit when brushing although still plenty left . My hair is also extremely dry and feels like hay on my head and at this point I have also developed greys .
It is extra itchy when I am on my periods and my periods are awfully long , heavy and together with the itching of the scalp my life is hell for about 2-3 weeks out of each month . I have been referred for the bleeding but the wait is long .
I am not sure if it's related but I also have thick facial hair and body hairs .
In a nutshell , an ugly , hairy , itchy , bleeding , greying mess 
Any help ?