I think I'm done with my Nictotine Replacement Therapy. I am 2 weeks ahead of my goal. I just don't crave the nicotine anymore. I have gone 48 hours with out a patch. I have plenty of gum so if I do get a strange craving I'll just try the gum. But I think I am done with the patches. It's been about 6 weeks since I last vaped. And my oxygen saturation when I went to my doctor today improved by 5 points.