Simply Sleep and residual effects

I take Simply Sleep once in a while just to help me fall asleep. I'm a 120-pound woman and one pill is usually enough. Last night, my mind was racing and I decided to take both pills. BIG MISTAKE! I had very weird sensations in my legs that still continue (it's now 11 AM, 12 hours after the dose). I guess it could be a form of Restless Legs Syndrome, but I've never had that before. These sensations (tingling, numbness, a desperate need to move) were enough to wake me up in the middle of the night and keep me awake, even though the rest of my body was tired. I'm dragging today -- a combination of no sleep and the residual effects of the sellping pills. My legs are still not right. They feel weak from the hip down when I'm sitting.