My jaw on the right side has been sore for a few days. it's very painful only when i bite down and my teeth aren't lining up correctly. is it tmj?

Might be : It could be. Jaw pain and bite changes can be a sign of an acute TMD episode. A problem with a tooth can give the same symptoms as well. Dental pain can be difficult to localize at times. See your dentist at your earliest convenience.

TMJ syndrome: may cause bite change, ear pain, ringing in the ears, jaw locking, jaw clicking and pain behind the ear. Proper diagnosis is the key to successful treatment. See Orofacial Pain expert for a consultation and treatment options.

See answer details: Inflammation within the TMJ can cause pain on chewing and can also change the position of the head of the joint within the socket, resulting in a change in the bite. A night guard and ibuprofen can help. If jaw opening is restricted due to muscle soreness, heat with slow gentle jaw opening can resolve this. If symptoms continue, an MRI of the TMJ should be obtained

Could be: Sounds like a TMJ problem. Could be other things. See oral surgeon for exam/diagnosis/treatment recommendations.