when I use marijuana I become afraid of God and feel Im doing somthing wrong
If that's true do you realise that's the opposite feeling that many of us have?
So in your mind smoking pot is a sin. Can I ask why you usurp the authority of God by decreeing it a sin? Do you not think that if it were a sin, God, in his omnipotence and ultimate knowledge would have included it in his Word? Why are you contradicting the word of God?