Anxiety and worrying, i only keep think about negative thing

hi im rafael im 23 years old, i have anxiety since i was 16 was when i haded my first panic attack too,so i only keep think about negative things that can happen on school ,working ,walking on street or any thing i will do.and i have pectus excavatum mix pectus carinatum and i was onlys thinking about these trying to hide these made me hide from people and only stay home + i had panic from things ill do like i started to drive 2 months later panic.so now on may 4 i haded my chest fix i was really happy with the result after 3 weeks i started to feel cold and hot (no fever )very anxious i was walking inside my house shaking my legs so my i went to the hospital they find out i haded fluid on my lungs i was on the hospital for 4 days ,so i went home and i still feeling bad very anxious i was waking nauseous and diarrhea pressure on my for head,and that something was stock on my throat so i went back to the hospital after 4 day they ask if i want help if i wanted to stay on hospital i sad ok so they send me to mental behaviors place when i got there i was scared ,i asked to go home but they sad i culdn't that i need to see the doctor only her can send me home so i was there for 3 day i was ok there i was talking with the nurses i but i was crazy to come home but when i got home i started to feel bad (anxious nauseous and diarrhea and i feel something is stock on my throat.so im taking prozac 20 mg , but i dont feel is helping me i still feel same way a little better but keep think what going to happen i dont feel like eating and waking up feeling nauseous and diarrhea i so now i got no idea what i have to do to feel better feel normal , i used to play video game for 6 hr now i cant even play for 1 is like sametime i want to do something i dont ,i got no motivation and if i try to do anything i feel fatigue and shaking weak can any tell me how or what i should do thanks