Have TMJ and i want my jaw back to normal?

i am little bit nervous and i press my upper and lower teeth toghether and i think it cause tmj but since i extracted my wisdom teeth my jaw move backward and make my face unnormal i quess that the space that provided after extracting my lower wisdom teeth and pressure from my uper jaw make my lower jaw move backward am i right? in all i just want my jaw back to normal cus it really change my face:( is there any suggestion about that tnx