Hi t331,
I am sorry to hear of this new complication. :/ I do agree that it sounds like this is most surely bruxism while you are sleeping...
...however, I think you need to confirm this with your doctor, and truly rule out any other issue to be sure.
Usually the unwanted side effects of a med do phase out...so I wouldn't throw in the towel just yet. You have put 4 weeks in, and it would be a shame to stop just before the therapeutic benefits really start.
Talk with your prescribing doctor and get his/her input as well...but know that this is a personal decision, so feel confident in making your own choice once you have weighed the pro's and con's.
Wishing you the answers and relief you need!
S.C.