X-ray images attached. What's the issue.

I have severe ear pain,lower jaw pain with swelling under the ear.Went to ENT,regular doctor to check sinus,ear.They gave me antibiotics for ear,sinus infection.it cleared up But ear pain, jaw pain with swelling still there.It's very severe. It is worse while lying down.I have throbbing pain in the upper and lower jaw.first lower molar hurts while biting.the bite is so hard when I close my mouth.That molars hit first & bite feels so hard when I close my mouth.not sensitive to hot and cold. But hurts while biting.Not while chewing food. Dentist took xray,said he couldn't see any infection in any tooth since I already taken antibiotics for sinus infection.What is the problem. The pain and swelling still there.Sometimes it will be sharp pain in the lower molar and in the jaw(under the ear). What could be the problem. How to proceed further.I am in US. Dentist said it might be crack but he is not sure.Just a guess he said. How to know if crack or any jaw issue?or jaw bone issue? jaw snaps.