I've been having pain in my right tonsil for about 3 weeks now and my jaw hurts when i open my mouth and my ear hurts too when i open it, what can it be?

Likely viral: You could likely wait and see if it resolves if you have no fever chills, joint pain or swelling and you do not have any dental problems. This is a season with high incidence of all kinds of viruses including influenza. If your symptoms get worse or you develop above contact your doctor immediately.

Have an exam : The symptoms you describe could be a number of different things. It's impossible to diagnose properly without examining you in an office. I recommend you see a dentist as soon as possible.

Dentist or ENT: Consult with a dentist or ENT without delay. This is not normal and hs lasted too long.

Need evaluation: it is not possible to answer your question without seeing you. There are several things that may be going on. See a dentist, oral surgeon or ENT asap for a exam. It may be a wisdom tooth, TMJ problem, infection or other causes, so get it checked.

TMJ syndrome: Temporo-mandibular syndrome is the second most frequent cause of orofacial pain after dental pain. TMJ syndrome may cause ear pain, ringing in the ears, jaw pain and teeth pain. Proper diagnosis is the key to successful treatment. See Orofacial Pain expert for a consultation and treatment options.

See dentist first: Many variables, from a dental standpoint, there may be wisdom teeth involvement which is creating pain radiating to the ear. See your dentist, have the dentist rule out any problems of dental etiology before seeing your primary care MD or ENT.

ENT first: Possibly TMJ, but the symptoms are troubling. I'd see an ENT doc first, if negative exam. See TMJ specialist. Any dentist can be a TMJ expert with the proper training and experience. Most commonly, oral surgeons, prosthodontists, and orofacial pain specialists. Ask your MD, your dentist and your dental society for referrals.