I have taken them years ago, but for a light weight like you I would be very concerned about you taking them. Personally I think there is more danger with taking the prescribed sleeping pill over taking a melatonin tablet. Plus you need to remember that when you took the melatonin you were on a steriods high going on 2 days without sleep. I think you slept that much because your body had missed 2 days of sleep. If it was me I would try taking a half a tablet of melatonin tonight & see what kind of results. I just remember how sensitive you are to muscle relaxers, how is your body going to respond to a full on sleeping pill. This advice is my opinion only, you do what you think is best for you