bunny,

I assume from you comments that you are a male high school student. It sounds like your stress load is way to high. It is likely the cause of most if not all of your struggles.

Have you had any blood work done? B-12, D3, folate, magnesium, Thyroid, sex hormones, stress hormones, blood sugar, etc. can indicate if your body is properly absorbing these nutrients.

Your thought issues sound an awful lot like PTSD. A high pressure life style makes PTSD miserable.

Regarding allergies, some simple food allergies can stress your immune system and stress your brain. The full spectrum of B's will help your immune system. Which multi-vitamin are you taking? Some have better amounts of the trace substances. The RDA's are useless for an injured brain and a stressed brain and body.

Are you on any meds?

What do you do to de-stress?

If you hardly responded to 1500 mgs of caffeine, maybe you are already at max adrenal effort. This would leave you system completely wiped out.

Have you ever been able to take an extended time off to rest?

Have you been involved in sports where you were subjected to any form of head impacts, even minor head impacts like heading a soccer ball?