I have Female Pattern Baldness which gets me down at times, I am only 25 and it started when I was 22, 18 months after having my second child. My periods had been gradually getting more haywire for years, many miscarriages I just couldn't fathom why (but now I'm convinced it will have been hormone levels), and despite not bf I hadn't had a period in 14 months, hair falling out but not yet noticeable, skin getting worse, hairy chin etc. Still GP wouldn't test me for anything, just said "What makes you think you have a hormone problem? You have 2 young children, Many women have irregular cycles, you are not overweight".
Eventually I went to another GP who did hormone blood tests and called me back a week later telling me my hormone levels strongly suggest PCOS / hyper androgenic state. Confirmed by scan showing ovarian cysts.
I was put on the pill Marvelon which helped immensely but gave me headaches so I had to stop it. When I stopped it the hair loss came back with a venegance 
I did some research and asked to be referred to a specialist reproductive medicine clinic. They have been absolutely brilliant and thorough, I am under a consultant there who really takes the problems seriously and the impact loosing hair etc can have on a person's life. I am currently on Mercilon (lower dose Marvelon) and a drug called Spironolactone (actually a diuretic but has the side effect of blocking androgens). I do see benefit however my hair is receding at the temples and my crown is thin so I have to watch what hairstyle I have and it is very embarrassing if windy.
At times I feel so down about it, my testosterone levels are naturally half that of a man
, and we women are only supposed to have small amounts.
The combined pill masks all the symptoms for the moment as it gives me oestrogen which I need but I'm well aware I can't take that forever (most GPs don't like you on it above 35 although some will let you continue with no risk factors but you can develop risk factors like high blood pressure at any time)
The Spironolactone helps too but has the side effect of making you pee all day, you have to get blood tests as it can be dangerous in increasing potassium levels in your body and affecting your heart, also it has been linked to cancer in rodent studies.
The doctor says if I stopped these I would go back again, it doesn't cure it.
So I have basically resigned myself to at some point having to wear a hair system / piece / wig. I have researched lots of types, and it helps me to know there are lovely natural looking wigs out there (I have a friend who suffers from pulling her own hair out and wears them) and that is an option if needed I wouldn't hesitate to get my own hair cut really short and wear one (although can be expensive).
It's really not fun, I empathise with everyone on this thread going through this and hope we can find solutions.
I too get the weird tingly, itchy, hot , pink scalp in the areas where I get loss. There is so many of us saying this we can't be imagining it!