Hello Welcome in H.C.M. Your medical history regarding acute pain in ear with hearing loss and tinnitus favours the acute otitis media but your complaint of lock jaw can t be explained from this site of infection. Therefore most likely you are having acute inflammation of jaw joint, as acute swelling of jaw joint may give rise to reffered pain to ear, by swelling of joint there may be difficulty in opening the mouth (lock jaw), blocked ear and tinnitus all are possible. My opinion is that you should consult your ENT doctor for thorough examination, necessary investigatins and finally treatment. Regards.