i hit my left hand(middle knuckle) on a glass table really hard while i was eating.it was painful was holding my hand few seconds later i had a really bad headache ,got dizzy and stomach hurt,and i fainted,passed out(still had food in my mouth). My boyfriend said he went to hold me because i almost fell out the chair and came close to hitting my head against the wall,i woke up told me to breathe slowly. he said i was shaking when i was out while he held me up. i still felt a little lightheaded and my whole arm is in a little pain. it never happen before.what could it be?