Roxiesmom333; This may explain your nightmares.

http://en.wikipedia.org/wiki/Melatonin#Dreaming

Buttrfli42481; Yes, products like these can be really iffy due to improper testing, and because of the way they are produced in the body, and the delicate balance of each individual when it comes to hormones. It's difficult to predict how any individual will be affected.