I'm desperate, I need advice on TMJ and teeth clenching!?

For the last 8 months I have been suffering from extreme tension like headaches, I was pregnant at the time and thought it was related to the pregnancy. I had my baby and the headaches kept coming back. My doctor couldn't figure out what was going on because all of my tests and blood work came back perfectly normal and he was very happy with all the results. So not knowing why I was getting these headaches had put me under a lot of stress, to the point where I was having extreme anxiety attacks, where I would almost p out. When my anxiety started on an all time high, I started to get a sore jaw and ear pain along with the headaches. So my doctor then suggested I see my dentist. He determined I was having problems with my TMJ because I clench my teeth due to stress. So he fitted me with a night guard to wear over my teeth. It has helped with the headache but my jaw and ears are still bothering me, which is adding to the anxiety I already have. My dentist thinks that maybe the guard isn't thick enough so he is making me a new one, and he said if this one doesn't work he will have to refer me to someone who specializes in TMJ problems. I got all worried about it and started reading about TMJ on the internet and was reading horror stories that people sufferened in pain for years with no relief. I have 2 small kids (2 years and 5 months) and I am terrified I did some sort of damage to the joints (though my dentist took an xray and said the joints looked fine) and I will have to live with this pain forever. I am 24 years old and have my whole life to live and I don't want to suffer anymore, I just want to feel physically normal again so I can enjoy my family. I would like to hear about other peoples experiences with this problem! Thank you everyone!