Like every one mentioned, its a process. Its very common, especially if you used drugs as a type of escape from whatever was bothering you. What you need to also realize is that these thoughts will go away, the reason you think like that is because when you get off the substance or cut down the usage your body thinks your depriving it of what it needs to cope. You should look into ways to keep yourself busy, i tell a lot of people on these boards this : Physical exercise is one of the greatest tools you have. It increases your endorphines (the chemical your brain produces when you get the sensation of being happy and pleased) This helped me more than I can explain.. I used to have horrible depression mood swings and relapsed a lot before i found this out so i try and share with anyone i can. A lot of people that use, dont exercise so its not something they think about. You might think about giving it a shot, it takes a week or so for it to really kick in but if you can stick with it, exercise will not only increase your ability to cope mentally but physically as well. If you want more information on it feel free to PM me, i'm more than willing to share or I can post it here if you'd like. Just say the word, I really enjoy being able to help anyone out because i've been there and its not fun to do alone.