Suffering a cold can often effect your desire to have a cigarette.
Essentially, you can break down the act of smoking into 3 different types of addiction. There is the biochemical addiction to Nicotine, that sense of relief that you get from your first hit, and the calming effect. Remember the calming effect is a false effect stemming from getting the nicotine hit.
The biochemical addiction is actually pretty short- lived - 5 days or so should see you clear.
Then there is the psychological effect, and it is this area that can be more difficult. You have to change your self image from one of being a smoker to being a non-smoker. You have to change your view of smoking from one of being cool, or hip, or trendy or fashionable to being one of addiction, of nicotine stains yellowing fingers, of coughs and phlegm, and financial hardship.
And then there is the very real issue of what to do with your hands - most smokers often smoke when reading, or when they are at the computer, or having a drink - you have to find a displacement activity to do when in those situations.
Remember that the first week or so is the hardest. Remember that as more time passes, it gets easier.
Remember that you are improving your health and likely lifespan hugely. Remember that you are saving yourself lots and lots of cash - and I found this particularly motivating.
And find some displacement activities - eat a segment of fruit each time you have the desire for a cigarette, or have a glass of water.
Should you make the decision to quit, I am sure many here and in your immdiate life would be very willing to offer encouragement and support...