Great step. If you've done 4 days cold turkey, continue like you are. it will get easier very soon the nicotine will be out of your body. Then it will be only psychological.
You can Use the one day at the time system, worry of being clean for the day, don't think of tomorrow. Get rid of ashtrays, lighters etc. I used a little piece of natural licorice to chew on during the day, but not necessary.(its like a piece of wood)
When I quit food tasted much better and had more energy. Think everyday about the positives you're gaining example: You're hands are not yellow, you don't stink etc. Don't give into the drama, catch yourself when you find your fantasizing about smoking and fight it, don't give in. It gets easier and easier. Live in today. Don't go for the "just one puff" you will start again, it never fails.