Psychological cannabis withdrawal.. maybe somewhere inside you convinved yourself that you need cannabis to sleep. Many of my friends have experienced it and so have I.. It's a bit of a downside but you can overcome it - remember what you've built up over the last 4 months is just a habit, I could give you advice on how to revert back to what it was like before cannabis.. but it sounds like that wasn't the best deal either.

Get some bud in