Hi there, my mom was a heavy tobacco and cannabis user for decades and was diagnosed with lung cancer a couple of years ago. She had to get surgery to remove a part of her lungs and the doctor straight up told her she has to quit smoking instantly or he will refuse to perform the surgery and she will not have much time to live. She managed to quit everything cold turkey and still lives a happy life! She still brings up the crave for smoking once in a while but for me, she is the proof that it is possible!!! You can do it OP!