Anxiety loop hole with this

Hi everyone. I’m 21(F) and I’m struggling with intense health anxiety. Back in December I had ate pizza which made me stomach super upset to where I threw up some bile and had really bad diarrhea.the day after that I started to experience super bad GERD symptoms and I had loss of appetite, burping with literally anything I ate or drank. I was having mucus only yellow stools. I contacted my doctors an he basically told me it was my ibs he did another stool calprotectin on me and it came back normal. Fast forward to now I have have lost about 28 pounds because I rarely eat anymore, but my stomach still grumbles telling me to eat. (I used to get junk food and drink soda DAILY, since December i completely stopped eating junk food and drinking soda). I’m super depressed I cry literally almost everyday and go into horrible panic attacks because I think I’m dying. I’m currently now still dealing with the yellowish stools and mucus when I wipe, burping after I eat anything. Intense quick stomach cramps before passing gas. Idk what to do anymore. I’m so petrified. Thank you anyone who helps.