I'm 17 and I know a lot of how you feel.
Ever since I was 11, they've been testing me for EVERYTHING they can think of.
I have horrible headaches, body pain, I get dizzy when standing, always tired, and I've even passed out when standing up.
So far, no luck, but I do have naturally low blood pressure.
Try drinking stuff with sugar in it when you get dizzy. I got some good advice: a spoonful of honey under the tongue puts sugar right in your blood stream.
I have severe headaches a lot, but one thing I can say: the best idea is to deal with the pain rather than get addicted to pain medication.
I'd ask for sleeping pills, they help me a lot.
Talk to me anytime, 'cause I'm going through the same thing.
Also, yes, dehydration is a big thing. I'm almost constantly dehydrated 'cause I cannot stand water.
I suggest trying to find SOMETHING that you like (something is better than nothing). I can drink gallons of koolaid and I love watermelon. Try something like that.
That sounds exactly like what I'm going through! I feel better after I eat something. I thought it might be diabetes because I have all the symptoms plus a family history, but my doctor tested me and said its not diabetes. I drink alot of water and juice.
It runs through my family too. My brother has it. But I don't, I just have the symptoms. I got tested for it as well. Just keep something sugary on hand. Pretty much treat yourself like you have diabetes, as far as the low blood sugar.