Are you on any meds? Some meds made me grind my teeth at first if they were too activating.

Are you on anything for your anxiety??? I find that if I take my anxiety meds, it settles my stomach.

But IBS is also exasperated by what we eat. Anything spicy or alcohol can really do a number on you. If I go out and drink one night, my stomach really reacts the next day. I would try following a bland diet and see if that helps. Google “IBS diet”. Good luck and hope you feel better!