hey honey,
Firstly welcome to the tmj board!!!
i am also a young person with tmj , i am twenty , turning twenty one in the next 6 months however my jaw has never locked and all the symptoms you have i dont have. If you read my other posts i suffer tremendously with earaches. Do you also have these?
You're medical practitioners sound horrible. No one has ever doubted my pain but they all believe i have a low pain threshold .. very easy for them to say! I wont go into my whole history of tmj as i have that in my other posts but basically i developed tmj when was 14 went on for two years , vanished by itself then began January 2007 until present. I am on splint therapy , upper and lower for almost a year now.
I had a jaw displacement which the splint fixed but now i have muscle spasms which cause earaches..

so frustrating!!! But i would like to know if you also have earaches?
Because i suffer incredibly from them! Tell me more about how you're symptoms are and tell you're parents NO you are not crazy and show them websites regarding tmj!!!
Hope to hear from you soon and once again welcome!