help worried

My daughter has horrible restless legs and hasn't been able to sleep she wakes up screaming I think I pain. She's also been crying more and more during the day out of no where. At first I thought it was her teething now I'm just getting worried it's something else I hate just giving her Tylenol all the time I hate it. Can any moms help me with some advice I'm going to make an appt soon just to be safe.