muscle spasms?

my psychiatrist upped my dose to 100 like three months ago. everything was normal and i didn't have any side effects, but around three weeks ago i started noticing body spasms, especially while walking. at first i didn't really know what to make of it, but now i'm starting to think that it could be related to zoloft somehow

the sensation is similar to the falling sensation you get when you're about to fall asleep, but a little less aggressive and it only lasts like one second. still, it's kind of annoying. i plan on talking to my doctor about this, but in the meantime i wanted to know if someone has experience something like this