ear, throat and nose burning

I woke up a morning, with alot of burning in my stomach till my nose, And after every bite of food or sip of any drink, i am burping constantly. I tried first peptobismol, it didn't help, than I got some pepcid complete. That didn't help eighter.. I went to the E.R. and the doctor prescribed me 30 nexium 20 mg. So far I have used 20 tablets, I don't feel the burning in the stomach that much, but I'm still burping alot and de burning spasm is still there,especially in the ear en nose. I want to know, how long it will take to heal this burning completely and what kind of food to avoid and
what should I eat more to get rid of the burning feeling. thank you Santa