Cardiology info. Have same symptoms?

Doctor, I have symptoms like chest pain( from a year) which comes and go.Now from few days i am feeling it while walking sometimes...i sometimes get numbness in hands and legs...pain in both the hands and legs...apart from that i have acidity..I have been to hospital for 7 times in a year to make sure yy i am getting this pain and i am clueless. Doctor can blockage of arteries happen at a age between 20-30 ???for a person who dosent smoke and consume alcohol?? i had my TMT a year before and its negative...I had my TMT,2D ECHO a month before and they are normal. doctor i get pain in chest 2-3 times a day, which stays for some 3-5 seconds ..which sometimes goes by its own or wen i change direction. If all the reports are normal I want to know yy I am feeling these symptoms and how to rule them out...any procedure..or else ots just because of anxiety and overthinking...Of its because of panic attack...can both heart attck and panic attack have same symptoms ??