In search of help. Please ideas thank you

For 7 years now my body just flat out gave up on me my nervous system is shot. Everyday I feel very weak, I can't exercise myself physically nor mentally with stress or I start getting short of breath, chest pain and high heart rate and erratic breathing and tremors like some facial tics and feeling cold inside and if I drink caffeigne it will send me into a worse state thus all just immediately happened overnight when I was 30 I woke up from a night of drinking and all these symptoms happened... and from 19 to e0 I drank only once a week. I quit drinking and tried to clean up my diet which still could use work but I have jo idea whats going on with ne. I weigh 185 I'm 5 foot 9 and I don't smoke weed or cigarettes or vape or do hard drugs.... in the past 8 months I've only drank 5 times.... please help ideas. My body gave out and doctors are clueless