Like Mrdevious said its probley just anxiety. I deal with the same shit everyday. And as for the neck pain if you have any soft tissue damage then it does tend to irritate it a bit. My neck is horrible right now. I was in a car accident a few years back that totaled my car and the impact point was only an inch behind my head. And my neck has been progressively getting worse. Especially within the last 6 months for some reason. Its so bad that im gonna have arthritus for the rest of my life in my arms. And im only 19. But anyways weed tends to irritate that.