Hello and welcome,
From the details provided ,you are assuming of Tmj disorder
or inflammation associated.
An OPG radiograph will help to assess any infection associated.
I would advice you to visit an oral-maxillofacial surgeon as soon as possible.
Jaws has to be immobilized.
Avoid mouth opening too widely.
If there is inflammation,antibiotics has to be administered.
Splinting has to be done if there is fracture
will help to relieve inflammation in such cases.
Frequent warm saline rinse may be helpful.
Hope this helps.