I am only 15 years of age, i usually get light headed and have a second or two of a blackout if i stand up too quickly then my head will go really heavy for another few seconds, i have a tummyache most mornings, almost an identical feeling to butterflies, my hands will sweat and i wont be able to swallow any kind of food, i will be hungry but then the thought of food makes me feel sick. The worst time of day is when i get home and go into bed, the butterflies and the sweats always come really badly. I can go out somedays and feel awake and normal but if i go into certain places e.g. Supermarkets and Shopping Centers i can almost feel like i am in a dream, i dont feel awake, i feel lightheaded and not quite with it, its horrible. I can also lay in bed and then my vision will all shake until i blink quite hard and it stops, im not too sure wether thats because i have been staring at my phone screen for too long. Can anyone please help me with these symptons or have any idea what might be wrong with me?