TooMuchForYa

Hello, I'm 18 years old and have suffered a very bad itching on the upper body, chest, upper arms, back, neck, and mainly my scalp, my scalp is the worst of all.
I have had this problem for 6-7 years and I always thought I had it because I had dry skin, but that was not the case. It happens mainly during winter cold months. It's the worst feeling I have and I hate it so much I had to quit High School because it was so embarrassing to sit in class and when it gets hot I just get the urge to start itching so I leave class and go to the bathroom and itch like crazy.
The itching happens when I get hot or at the point when I'm about to sweat and my chest gets really red then when I cool down all the redness goes away like it was never there. When I thought I had just dry skin itching I've tried many dry skin lotions and shampoo none of them worked, now sense I know it's not dry skin I might have to start taking medication or some pills.
I just really want to figure out what's wrong with me and I want this problem to go away for ever! I believe I might have Cholinergic Urticaria or whatever.
Can someone help me tell me what I need to get so I don't have a itchy feeling anymore. Anti-itch shampoo and lotions don't work for me so can someone tell me some pills I can get that I don't need a prescription for? Because I probably won't have the funds for expensive stuff. Or will I need to actually go to a Doctor? Or will Acupuncture work?..
I just really need help the itching sucks so bad! I can never go out and do anything and when I do start to itch, it just makes me want to break down on my knees and itch. I need this to go away really bad. Any help would be appreciated.