Shakey legs

I have an apointment tomorrow woth a nurologist for my 2 and a half month old daughter. She was seen when she was 6 weeks for a shaking in her legs. They told me at that time not to worry about it apparently it's called Clonus and a lot of babies get it, she may grow out of it but to bring her back around this time for a recheck. Well here we are and her legs are still shaking, the same amount if not more and I'm worried. Has anyone else had this problem? Should I be worried? I looked Clonus up and watched a video. A lot of the kids are having full seizures. Thank god she doesn't do this. Can it still be the same thing? Please ease a new mommy's mind. Thanks Ladies