Muscles in your leg AND your hand/arm AND your mouth? The same symptoms, across all three parts of your body, each time? Is it the same side of your body? I dunno, but seems unlikely that it'd just be muscles, sounds more neurological, e.g. your brain. And yeah, that seems quite scary. You know how a stroke can harm your brain and make half your body go numb? Maybe it's something like that, but obviously lesser in effect. I hate to tell you to go see a doctor, because I hate going to doctors, but...