Preparing to Quit

I took my first dose of a drug which is suppose to curb nicotine addiction today.  I have set my quit smoking date as 29 March, which is 14 days after I commence the medication.  I am very anxious about this as being a 30+ year smoker.  But really, nothing good comes out of it except heart disease and/or cancer.  I have tried to quit many times, however, I have never been more motivated. My annual physical indicated pre-hypertension blood pressure.