Good to hear Mr A.
The hardest part is making up your mind that YOU want to stop. Once you manage that you are 75% home and dry.
After 13 days I would say you are over the hump and on the downhill stretch.
For encouragement get on the Net and look up all the lung and bodily damage caused by smoking that the body can repair quite quickly just by stopping.
Keep it up. I know it's hard to believe but after a surprisingly short while you will forget all about smoking.