What Causes Burning Sensation In Mouth With Dry Nose?

Question : I have been feeling a burning sensation in my mouth on the right side when you roll your tongue underneath the gums. It seems the nerve there is a bit tender. I went to the dentist and he said it could be an infection. There werent any ulcers in the mouth. He prescribed amoxicyllin for 5 days. However it keeps coming back or probably never went away. The burning and Tenderness is more in the evening. I also have pain in my ear that comes and goes. My mouth and lips burn at times and is largely on the right side. Though sometimes I also feel it on the left hand side. Since two days there's a bump on my gums that broke and now it has a white skin under which there's a little red lesion - as if it was bruised. I don't have fever. I also have a dry nose. I showed it to an ENT and he said it could be allergy but nothing to worry about. The symptoms don't seem to go away. I noticed that the pain in the ear seems to go away if I take an antacid - not sure what is happening. The tongue burns too.