New Here - Horrible sleep problem

Hi, I am 18 and female. I have various psychological problems, but I cant discuss them all at once.
Since I was about thirteen or fourteen, I started having sleep problems.
I had severe seborrhea on my head, and I think also in my vaginal area. My head was always itchy during the day, but usually didn't get it's worse until I fell asleep.
My life was never easy, I have many food allergies, etc., but I know they weren't the only cause of my sleep problems. And please don't ask me why I didn't do anything to help myself for five years.
Almost every night for five years has been like this : Soon after i fall asleep I wake up scratching my head like a maniac, an am some nights scratching around my vaginal area too. I am unable to do anything, even though I'm half awake, for hours; I can't control my hands. It's horrible.
I'm a virgin so it hurts more.
What I do around my vaginal area is messed up. Its like I'm half-masturbating, half-scratching. It lasts hours non stop and I sometimes have my eyes open. But I cant stop doing it no matter how conscious I am, or painful it is. I can be so violent it's like I'm being raped. But I'm the one doing it.
I recently tried using Nizoral shampoo to help. It only helps a bit.
On stressful days, it gets worse. And if I eat so much as a cookie, or something small I don't usually eat it gets really horrible.
Last night was the worst its ever been. Of course it had been a horrible day so that added to it.
I not only had that problem, I had a terrible stomach ache and head itchiness too. Anyway what I was doing in my vaginal area last night lasted for hours. I have never been so violent before. I feel like I stuck my whole hand in there. Like I was violently raped.
I cant do this anymore. I cant get rid f the stress in my life, everyone has hard times. I cant spend those times doing what I do to my body. Has anyone had a problem like this? Please anyone help.