What to do if i have tmj, any tips on how to unlock my jaw?

See Dentist NOW: If jaw is locked you probably have a disc out of position, the disc that fits between the bones in the joint. You need professional help now. This isn't a diy project. Please call your dentist.

Consultation: Do not try and fix your problem/problems on your own by looking into an otc mouthpiece for grinding/clenching. You should see a dentist or tmj/tmd specialist to evaluate your symptoms and treat the problems.

See TMJ Specialist: See a TMJ/TMD specialist ASAP. Complex problem. 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.