hi Carolyn,
yes, I think it likely is more a neuromuscular thing rather than med related stuff.
been doing some checking myself, and it seems it is likely very normal for our tongues to move slightly, and yes, that more distinct movement or side turning is more unusual maybe, but not necessarily cause for alarm, as, like with TS, inherent things may be at work and "normal" for the indivdual.

as with all things one notices re body/health, always good to mention to your doc next time you talk...