I believe it is referred to as proprioception. I apparently have that too, but for me, it’s more often felt when I’m walking at the edge of a path or sidewalk, or on a narrow one, always feel like I’m going to “fall off” it. Not great, but not life-ending. And if I must spin or turn around in tight spaces I also often feel less stable. My neuro has confirmed I have that symptom, & is part of MS.
Good luck, speak to your MS Neuro, to see if there’s anything you can do to improve that problem.