My Tongue Is Red And Has No Coating And Is

My tongue is red and has no coating and is burning. I wake up during the night with dry mouth but drink a lot of water. It has been like this for about seven days. I have been staying away from acidic foods and I don't know what is causing this. I have been on antibiotics for 10 days? Could this be the reason and is there anything I can do to stay the uncomfortable burning sensation?