I Am On Omeprazole /40mg/gaviscon/ And Any Other Acid Reflux

I am on omeprazole /40mg/gaviscon/ and any other acid reflux over the counter medicine I can fine. I have had a horrible burning in my mouth and lips for the last three weeks. Food taste terrible! I have had upper gi test, colonoscopies, and no one can help me. I have been told that my esophagus is twisted. Please give me your opinion. By the way, I am on Topiramate for essential tremors.