1) I feel light headed
2) I cannot sleep at all
3) I randomly feel cold and warm
AiDS
If you go to the doctor and he/she can't find anything, You most likely have some sort of an anxiety disorder, contact a shrink after you see your doctor.
Lupus
Or the other way roundYou ate mexican food cooked by asians.
1) I feel light headed
2) I cannot sleep at all
3) I randomly feel cold and warm