Hi Katy75 I didn't answer your original post as you already had a lot of advice form others.
Pleased don't feel ashamed that you haven't managed to stop smoking. It is a really difficult to stop and took me many attempts. Eventually I did stop by going Cold Turkey but it took a lot of doing. I kept telling myself that it would only take one fag to start smoking again which frightened me enough not to smoke one. This way may not be for you as you say you have already tried going Cold Turkey.
I very nearly succeeded stopping years ago but when I was down to only a couple of ciggys a day I had a death in the family of someone very close to me. I was a lot younger then and found it difficult to cope with so started smoking again.
Slow but Sure Method: What I did was to mark down in a note book how many cigarettes I smoked in a day. For example if I had smoked 20 cigarettes on Monday I would mark it in my notebook. On Tuesday I could smoke another 20 cigarettes and the same for any following days. You are not allowed to smoke more than 20 cigarettes a day under any circumstances. Smoking 20 cigarettes a day might continue for 4/5 days then you might only smoke 19 cigarettes one day. Now you are allowed to smoke only 19 cigarettes a day but no more than this. Eventually you will smoke only 18 cigarettes and aren't allowed to smoke more, then 17, then 16, then 15................................then 3, then 2, then 1, then none. You are never allowed to go up, you can stop the same or you can smoke less. This way you can do it at your own pace which I know takes longer but I think you will be surprised how easy you might find it compared to other methods. I hope I have explained it so you can understand what I am saying? It's not as complicated as it might sound.
Tip: Having a hobby to keep your mind occupied is also very beneficial to take your mind off smoking.
There is plenty of help available now from your Doctors for anyone wanting to stop smoking. All you have to do is ask.
I haven't read any of your other replies yet but I am sure you will have been given some good advice.
I wish you every success.