KiCkLiNeQt

Hi, I guess I should start by saying that I'm a fifteen year old girl and weigh 100 pounds, and Im really worried. I dont no if whats happing is anything serious but lately I've been getting some weird symptoms and im not sure if these are signs of something that I should go to the doctor for....
-Lately when I try to sleep im eaither up till like 3am and finally get some sleep or i will sleep for a little while and then I wake up in the middle of the night and I cant fall back alseep
- I have been getting these really bad headachs that dont really go away even if i fall asleep with one, in the mornig i still have it.
- I've been reacently getting nosebleeds, i have had two in the past week, and another a little while ago, i mostly start to get them when I cry , but just last night I got a small one from just lying down. Now I never used to get nose bleeds this often except for the occasonal one - in - a -blue moon kind of thing.
- Again recently I have been very light headed often when standing up, now I no like sometimes when people get up fast they can sometimes fell lightheaded but when I get up its alot worse , because like im not sure how to explain it but my vision gets weird and i feel like im just about ready to faint, then after a few minutes it goes away.
- Im really prone to low grade fevers but like most of the time my temp. is low like around 96.0, 97.0, and sometimes it even goes as low as 95.6.
- Sometimes when Im cold or in a cold room, I look down at my hands and i swear it looks like my skin is riddled with lines and it goes all the way up my arms i mean i guess its just my veins but its weird because my fingers also sometimes turn a purpleish blueish color.

Well thats pretty much it, I hope I dont seem like Im over reacting but Im just scaired that theres something wrong and I dont know about it. I'd really apreciate it if you can help.
Always,
- Confused