Hi Sir, Last night i got blacked out for almost 15-20 min, couldn't see anything, felt very uneasy, couldn't breathe properly, my hands were shaking and couldn't speak properly, I got too scared because pf this. I've no history of any illness as of now , this all happened when I worked out in gym for 30 min snd that too with very light weights, more of warm up exercises as I resumed gym after 3 years so was just warming up. Kindly advise if this is something serious and I need to see a doctor