My dentist is recommending a mouth guard for me for night time because it's becoming clear that I'm clenching my jaw. I'm wearing down my teeth, my gums are receeding, and I have a very strong suspicion it's contributing to my migraines. I'm not in a place right now financially that I can shell out the $300+ for the customized one that the dentist can make (that is not covered by my dental insurance - they've checked). I know they sell them at drug stores and stuff for a heck of a lot cheaper. Can anyone recommend one?