Calms Forte and ADD..?

I'm a fifteen-year-old girl with attention deficit disorder. My mind is always racing, and sometimes I find that I'm too distracted to sleep. My mom gave me a bottle of something called Calms Forte, and told me it might help. But the thing is, it's supposed to be a natural supplement, and I've never tried one of those before. Does is it even work, and if so, what are the effects? Also, the bottle says to take 1 to 3. I should take 2, right?