Headache, ear fullness, jaw tightness, bitter taste in mouth. last mnth dentist said wisdom teeth looked great. what could it be?

Infection: This is likely an infection. The fullness is swelling. The inability to open your jaw fully is again swelling. The bitter taste is likely pus. This all points to purulent infection. Your wisdom teeth may have been great a month ago, but you have an infection now and should not wait to see a dentist or oral surgeon. See your doctor asap.

TMJD: All of the symptoms but biter taste could be temporomandibular joint disorder. You could consult with an ENT and a dentist who treats many tmjd patients.

Likely wisdom tooth: It is very possible to get a pericoronitis which would give you these problems. This is an infection under the tissue which is over part of the wisdom tooth -- on the lower jaw. See your dentist about this. You are 19 and still growing -- teeth can still be moving.

Wisdom tooth pain: There are a few things that can be going on and your dentist or an oral surgeon would be able to determine this. TMJ, tooth decay, Infection,or even the wisdom teeth could be causing this. Wisdom can change position as they try it erupt. Depending on how long ago you had a wisdom tooth evaluation, things may have changed. See a dentist ASAP.