Hi,, and welcome to Neuro Talk. RSD does need to be considered when doing any proceedure. The doctor doing the endoscopy should be working along side of the doctor who is helping with the RSD, so you don't have a flair up.
I wonder if there is another form of "sleep" medication you could be given such as "The old fashioned gas"
As to the Gerds. this is where I do sympathize. I had this many years and let it go as I had no insurance. It did go into Barretts esophagus. I take a PPI called
dexilant, which to my knowledge is one of the best. My Barretts has gotten a bit better over the last two years. I do have DNA changes, so I worry a bit like you do. Do not fail to be followed up for your Gerds like I did. Bring your concerns and issues over the RSD to the doctors attention and start asking questions. Get the physicians to work together. Let me know what you decide to do. I am in your corner. ginnie