Hello everyone

. I just found this forum while doing some research into a jaw problem i've been having recently. I'm hoping I can get some kind of answer/explanation as to why I am having this problem. I'm also continuing my own research.
Just for a little background; I'm 25, healthy and from ages 8 to 13 I had braces, headgear, the whole deal.
In the past year, whenever I'm cold and wet (in a pool, or cold ocean water) my jaw, on the right side, pops like crazy. The popping occurs right in front of my ear. It's not terribly painful when it happens, but there is pain and discomfort.
It's also consistent, meaning, everytime I open my mouth, when cold and wet, my jaw pops...everytime.
During the ages of 8-13, I was also using headgear to correct an overbite I had and, to some degree, still do. I've also been in a few scuffles so far in my life, so I've been punched in the face maybe a handful of times (not sure if that has anything to do with it).
I've seen a reference of something called TMJ, related to having braces, but I haven't done much research into that yet.
Any thoughts, advice, opinions would be greatly appreciated.
Thank you in advance.