Hi guys. I have been suffering from depression and anxiety for about four months, and I thought that smoking may have something to do with it. Day 3 is coming to an end and it has been the worst so far. I felt like I needed to go to the shop and get some cigarettes. I was so tempted, but I want to quit so I did not. I have been feeling really light headed and dizzy too. How long do these normally last? Last time I tried to quit I made up a silly excuse just to start again. I really want to stop but I don't feel good at all atm.