Hi MrsFowkes! You seem to have a pretty good understanding of what you are doing that is causing you to fail each time in your effort to stay quit. As others have said, the stress you are relieving by smoking is the stress cause by your nicotine addiction and the repeated association with smoking when you have life stress. Only you can break that cycle - no one else can do that for you. It's not easy for sure but everyone of us here has had to do the hard work to get to where we are and the good news is .... so can YOU!
Part of what you are doing when you light up a smoke in a stressful situation is you are just taking a small break to think about the situation and what you should do to get through it. You can still do that but without the smoke. Take a small break from what you;re doing and go for a walk or just to a different room and take some deep breaths, suck on a hard candy - whatever allows to to calm yourself so you can think about things. You might just find that works as well as having a smoke. Did having a smoke ever solve even 1 of your problems - I think not. Just gave you a distraction so you could think about things.
Stick around here. You will find the support top notch and that counts for a lot when you are struggling. Go to our Daily NOPE page and pledge your nope every day. I think it will help.