After upper endoscopy (no sedation, mild gastritis and esophagitis, weak les, one biopsy) my heartburn is much worse. why?

Did you go off meds?: Did a doctor ask u to stop treatment or medications prior to the test so that the test wd b more accurate? I suspect this is your case. Going off meds means a gap in treatment; if you have not restarted the medications, then there is further time for "wash out" (all meds wear off, given enuf time). Alternately, if the endoscopy showed no change, u cd have developed another problem altogether. TTYD

Pain s/p endoscopy: Since they did a biopsy they had to cut , though it was small, so acid against an open cut would hurt. Have you resumed your medicines or started medicines like zantac, oemprazole, carafate (sucralfate) or mylanta, that may ease the pain.Discuss wtih your doctor.