Desperately want to quit

Hello All,I have decided to quit very seriously this time and hence my first post to tell you about my situation. In the past I used to read materials on whyquit.com and posts on various forums to help me with the inspiration to quit but never posted anything but this time I really need help. I am 34 years old and have been smoking for 14 years and 4 months now. This all started in hostel days when I thought smoking would make me look cool,smoking cessation, macho and mature. Its ironic that it must have taken just 15 days to get myself hooked up to smoking but it has already taken 15 years of trying to give up but to no avail. I have smoked around 15 cigarettes per day since the first few days of starting smoking. Now the urgency is there because from the past one year I have been experiencing chest and left arm discomfort and started to live in a constant state of horror and depression. Last year in december I quit but it could last for only 10 days. When withdrawl hit me very hard,quit smoking, my mind made me to believe that I would be an occassional smoker and lit one and then went back. Six months ago I started feeling pain at the back of my chest and I went to a doctor, he suggested me to go for an X ray. That was the time I quit for 7 days. On the 7th day my X ray results came and everything was fine, so I went back to smoking. In the month of September I felt more pain than the discomfort that I used to experience in my chest and I measured my blood pressure which was higher than normal. I immediately took an appointment with a heart specialist. That time I quit for 20 days then again went into remission when the results came to be ok. The doctor thinks that my heart is fine but I have a feeling that all is not well with it. My problem is: if I smoke I feel this pain in the chest and guilt in the mind and If I quit then I start feeling better physically then my mind says now you can smoke and I smoke. I have been playing this cat and mouse game for a year now and now I want to take that leap to quit it now for good. My plan is to take 1 day at a time, excercise, read, browse this forum and make this quit a succesful and lasting one. I am going to do cold turkey as I believe I can manage the physical pain but its the psychological pain that I am not able to bear. So help me God. Need help and support from this forum. My quit date is Jan 4th 9 PM EST.Thanks.Desperado.