Mouth infection. Know the exact problem.

Hello. I posted about my problem fews days earlier as well. Im hvng problem of lumps on inside of both cheeks. There's no pain at all in dat area. But few dayz back I had swelling near right ear n ws feeling pain while eating. I went to ENT n he said it's mouth infection. He prescribed me antibiotic for 5 dayz. It's fourth day since I'm taking medicines but yesterday evening I suddenly had pain on the sides of my neck. It ws not a severe pain. Today morning I had pain again on the sides of my neck n then near ears. Still hvng the pain near ears. Again it's not severe pain. My mouth is getting dry. I'm really worried about my problem. Getting freak about it. Please help me out to. Know the exact problem. Thank