about 2 days ago, i started getting muscle spasms in my legs....the first time it lasted for about 5 seconds and it was my left thigh. then it happened again about an hour later and that lasted a good bit, probably around 30 seconds. it has been continuing now for the past 2 days...and it seems that it happens only when i'm laying on my back (like right now, i'm laying with my laptop on my legs in bed). i figured whatever, they're not painful like i heard spasms could be...but then a few minutes ago, i started to feel the same vibrating (for lack of a better word) type of spasm but in my left cheek. the day after this started, i was at the doctor's for a check up and i mentioned this. they kinda just blew it off like it was nothing. any ideas? should i be worried or something?