Thanks for asking query,
Pain in the left side of the jaw, left ear (reffered pain) and difficulty in swallowing can be due to Temporomandibular joint disfunction.
I would suggest you to visit to an Oral and Maxillofacial Surgeon and get a checkup done,
Take an OPG radiograph , if you are having any infected tooth get it treated.
Apply moist heat towels over the joint externally, take tab combiflam
500mg for pain relief, in some cases bite splint
can be given.
Take semisolid diet, maintain a good oral hygiene
Hope this helps out.