hello, yesterday i had a near fainting episode, i was very pale, weak, shaky and lasted around 10 mins. a couple of hrs later i have had a tightness in the middle of my chest, its a constant ache. i have no problem breathing in or out or moving about, and no change to pain if im resting or moving about. i took antacid pill in case of heartburn but no change. i am 31 yr old female, no history of chest problems, in good health although about 20lbs overweight 5"3