Pending on your age, it's best to go to other dentists who may specialize in the jaw-area. When I got my braces off in my teen years, I noticed the clicking on my right side but ignored it. Until it started hurting I told my mom and she brought me back to my orthodontist who was horrible! He recommended I get braces again, which my mom paid for, and the clicking went away. But, when I got my braces off, the clicking came back again.
Finally, after much time lost and finance, I went to my friend in dentist school to ask their profs. about my condition. Got a referral and such.
I currently visit a tmj specialist in Toronto where he has made a thicker retainer/splint that pulls my jaw forward to relieve the pressure and stress. Of course it's pricey as I am in my early 20s where I am no longer covered under my mom's insurance plan, but I am now feeling better with my appliance.