Try the recommended moist heat and relaxation methods. However if these symptoms continue then you most likely have an imbalanced bite. You will need to locate a dentist that is proficient in stabilizing your bite into a centric relation bite, not the normal centric occlusion. Your muscles cannot relax if they cannot get to centric relation. Find someone that is trained by the Pete Dawson Academy. You might have to start with a properly made splint to calm things down or have the bite on the new fillings checked to get your bite more balanced to physiological rest which is centric relation

Ron Neer