Intense Shoulder Pain

Having bad shoulder/jaw pain and assume this is from the TMJ. I’ve told my dentist about it for a the past year and they just recommended some exercises which did not help. The clicking on my jaw is only bad when I deeply yawn now but I constantly feel sore in my back shoulder and jaw. I’m not sure where to start or who to talk to since my dentist hasn’t been helpful. Looking for advice, thank you.