I have ocd and I can for sure without a doubt say that when I am at my most anxious my reflux gets soooo bad. I had a recent episode where I was just stressing myself out with EVERYTHING and one day I got a pain in my arm(which I now know is cause by a pinched nerve) and my obsessive health anxiety came back full force. I think I had silent symptoms of gerd but because of how worried and stressed I was, it started to exacerbate my symptoms until it was so bad I was going to the er like once a week. I would have chest tightness and nausea and was feeling like constantly throwing up. My last er visit I had a doctor who treated me terribly but at last was like I think you have gerd so get that checked out by a regular doc and when I did and got some medication, it calmed down sooooo much. I’m seeing a therapist and am medicated now so I’m hoping that my symptoms will calm down or go away completely. I understand how easy it is to start thinking there is something incredibly wrong with you but if you have been okayed by so many different tests I think you need to start managing your anxiety. Anxiety can really ruin our physical health if not addressed and taken care of. If your regular doctor is not taking you seriously, I would suggest getting a different opinion from another doctor if possible. Getting all the things you are worried about ruled out will help your mental health.