3 drinks last night, no recollection of anything that happened (no, not rufied). Awful headache, sensitivity to light, shaking, vomiting, chills.??

Coincidence or... While your symptoms today could be due to a bad hangover, 3 drinks aren't likely to cause this unless you're unusually sensitive or allergic to alcohol (or unless someone did somehow slip you some drug). While this wouldn't explain why you can't remember everything,you might have a flu-like illness or food poisoning explaining how you feel today. In either case,homeopathic Nux vomica 30c may help.
Hangover vs virus. If it's not a hangover and your were ruffed (?GHB) then it could be unrelated to the booze and could be a viral illness.