I think that's apart of bipolar. I'm on Depakote and Abilify and when I started to get irritable and annoyed easily. I told my doctor about it and it turns out it was my bipolar acting up and he had to up my Abilify.

About the melatonin, my father takes it who also has extreme insomnia. Though it might not work miracles it will still help you get more relaxed and more at ease to fall asleep. It doesn't work all the time but it is definitely worth the try so I'm glad you are going to.