I've stopped smoking 18 months ago, but even after 1.5 years, I still get the urge to smoke almost every day.
There are few short term advantages to quitting smoking - your sense of smell improves and you have more spare time on your hands - other than that, there's little to brag about.
By going through this short term suffering, you're improving your long term health.
If someone (God) came to you and said: "Hey, I'll add 10 healthy years to your life if you agree to go through a period of feeling shitty and some mental fog and restlessness and nervousness for a couple of months".
I guess we'd all agree to such a deal and it's pretty much the deal you have right now, so hang on.
Congratulations on your decision and good luck !
I have anecdotally heard that if one had not smoked by adulthood, chances of addiction are fairly low.