Congratulations Dna.....Stopping smoking is only as hard as you make it. I used to smoke heavily as fuck and gave up without any problems whatsoever, simply decided that it wasn't worth fucking my lungs and skin up any more and stopped a piece of piss, no hassle. You can too. Luckily, you only smoked 5 a day, which is a very small amount. The hardest part for you will be the habit, as opposed to chemical dependency. You will get over it soon enough.
Here, this might interest you:
http://whyquit.com/whyquit/A_Benefits_Time_Table.html
Your lungs will thank you. Soon you will feel so much better. There's a noticeably
clean feeling in your body when you stop. You wll notoice it, definitely. I still enjoy the odd joint, and each time I do, I end up regretting it as I feel dirty. You just feel so much more crisp, fresh and clean when you don't smoke.
And thinking about it, it's a really insane thing to do: burn a highly-carcinogenic leaf laden with disgusting chemicals and inhale the resulting carbon emission, fucking up your own health and without even achieving a decent high. There is NO POINT.
You can do this. Exercise/walking/running will help massively. Eating a balanced diet will help massively as well....I used to find I'd get more cravings on days where I consumed caffeine and sugar.
Take care!