Alright a little while back i was smoking weed with a few people and ever since after that night i have been experiencing a foggy like state (almost as if i'm still half asleep). My balance, and alertness isn't what it should be. As well, i have been experiencing migraines on the left side of my head. I just figured it would go away with time but it hasn't and i'm beginning to get worried. What could the problem be?