Daephx

https://www.youtube.com/watch?v=hWeLMnE_rbk this is a video i took of my game. ill provide more info as needed but it seems to persist even though i disabled all my mods i tried to use FNIS and idk if that contributes to the problem but how do i fix this? cant find anything online that helps thank you! : it seems I stutter like my character is alternating between running and sneaking speed, i attempted to crouch repetitively but it still persists