Hand gets "stuck" while handwriting

Hand gets "stuck" while handwriting I get this thing where my hand kind of.. freezes for a moment while writing? Happens at random times, it's not limited to certain letters. Like i can't get my hand to write it right away/properly. It scares me a little, could this be a sign of an underlying problem? I'm autistic and have some symptoms of dysgraphia but not diagnosed with it (yet). I stutter only when i'm anxious but idk if that has something to do with this handwriting problem.