I have had 6 endoscopies and have never had any problems with them. After 2 of them, I actually played in my school concerts the same day with no problems. It's also a very easy procedure to have, and the risk for complications, especially with UES, are quite low.
Right Temporal Lobectomy 4/5/12
Diagnosed with GERD, Eosinophilic Esophagitis, and Epilepsy.
Studying biomedical engineering to research a better fix to at least one of them.