anyone else have involuntary spasms? spasms getting worse, should i be worried?

basically i get hand spasms pretty often and i sometimes drop things, but i’ve been recently getting full body, pretty intense spasms in public. its like getting a shiver but i don’t get that “i’m about to shiver”feeling beforehand, i just convulse and it’s quite a lot more violent. i get embarrassed when it happens but i’m mainly concerned about if it’s a fibro thing or something else to worry about? i only started getting them this year so idk. anyone else have this?