That's happened to me a couple of times. Unexpectedly, both times were taste related
The first time was about a month after quitting. I DIY my
juice and liked the one I'd been using but something was just missing...
Turned out it was the flavor, or lack of it. I thought about what was different and came to the conclusion that what was missing was the bad aftertaste that I'd had with smoking but just no longer noticed. I changed my mix for a slight unpleasant aftertaste and it did the trick. I've since gotten used to the mix and no longer notice the aftertaste except after eating or with coffee when I need it the most.
The second time, I'd just gotten over a head cold and was craving a cigarette for some reason. I was baffled as to why now? I'd been cig free for about 6 months. I had dreams about smoking 3 nights in a row and woke up and decided "Today I'm going to smoke a cigarette". Well, I mixed some double strength(36mg) to try first and that did the trick. Vaped on it for a couple days and then I figured it out. I'd grabbed a 50ml bottle of unflavored juice when I was sick and didn't notice because I couldn't taste anything. When my cold cleared, my smell came back slow so I didn't notice the lack of flavor.
There's more to a smoking habit than just the nicotine. I'd recommend getting some xtra strong nicotine for emergencies. It held me over until I figured out where the cravings were coming from.
