It may not seem like it, but if you have withdrawal symptoms it is mostly a good thing-it's a sign that your body is healing and getting rid of toxins. If you have symptoms after quitting, they will probably be strongest in the first few days. They are usually gone altogether in 2-4 weeks.1
It's a good idea to talk with your doctor about this. And, check out 3 Common Quitting Aids that are designed to help cut withdrawal symptoms.
People have different experiences when they quit smoking. Some have no withdrawal symptoms at all. But if you do, remember they will fade away over time.
1 Centers for Disease Control and Prevention. (2014). Tips From Former Smokers. Atlanta. Retrieved on 1/7/15 from, http://www.cdc.gov/tobacco/campaign/tips/quit-smoking/guide/withdrawal.html.