GERD CAUSING VERY BAD SMELL FROM NOSE

I have had a very bad room filling foul smell from my nose since last year october. I visited a gastroentrology, who after an endoscopy, diagnosed me of:
Gastro oesophageal reflux disease la grade a
Gastric ulcer
Erosive pangastritis
I have been on PPI, MEBEVERINE, PROBIOTICS, DONPERIDON, DIGESTIVE ENZYMES for 3 months now. Although my abdominal pains are almost nonexistent, my breath is still as bad as before. i have also tried diet for almost a year, tried aloevera, ACV coconut water and i got my tonsil removed. The smell basically comes from my nose only and is a mixture of all the foods i have eaten for the day and a foul smell. I NEED HELP!

Thanks for your reply. I saw a different doctor, who carried out another endoscopy. His diagnosis is
Atonic pylorus
Chemical gastritis
GERD.
The doctor recommended Sucralfate( two weeks on, two weeks off) in addition to Nexium and Domperidon. I'm just 30% into the treatment and my breath has greatly improved.