Thanks for your query, I have gone through your query. The swelling over the cheeks and swollen lymphnodes can be because of the infection in the teeth leading to cellulitis. The burning sensation in tongue and cheeks can be because of the aphthous ulcers secondary to stress. Nothing to be panic, consult an oral physician and get it evaluated. You need to a get a radiograph done to confirm the diagnosis, later we can treat accordingly. For the burning sensation over the tongue and cheek, you can use topical analgesic and anesthetics like choline salicylate and lignocaine respectively. Do saline gargling. I hope I have answered your query, take care.