Definitely dear, It's normal and the same goes with me. When I was still in college, I smoke to release the tensions from exams, activities, student's workload and the like. It's comforting somehow, but once you get addicted to it, you'll feel more stress than when you haven't had the experience. It helps to temporarily deal with stress and anxiety, yes it does, like when your craving for sweets are satisfied. However, in the long term, it will no longer be beneficial.