Yes, for your symptoms dental check up would definitely be helpful for building treatment plan even more precisely.
Mouth wash: BETADINE gargle, 5-10 drops, take raw in mouth, hold for 2-3 minutes and spit out, do not swallow. Do not eat drink or rinse mouth for next half an hour. Use mouth wash once every 2 days,after meal.
Next Steps
clinical examination is mandatory in your case.
Health Tips
Do not do Hot compression/balm/ointment application extra-orally on cheek region.
Luke warm water salt gargle a few times per day, only if it's relieving the symptoms even partially.and no H/o high blood pressure.
Avoid hard/hot/cold/sweet/sticky food.
Soft diet.use spoon while eating.
Do not neglect brushing twice daily after food.
If difficulty in opening mouth/swallowing hold mouthful of Luke warm salt water for a minute(avoid salt if blood pressure is above normal limits).