Hi ledighmac! Welcome to VU. I went through a lot of rough changes over the course of first starting to vape. It took me 3 or 4 weeks to completely put cigarettes down, so as Merc mentioned, don't beat yourself up if you do smoke. I did that enough for both of us when I couldn't put them down. Cigarettes have sooooo many other things in them. When we attempt to quit, it's not just the nic our bodies have to adjust to. We adjust to not having all of the stuff going into our bodies anymore. Part of this is the healing process, to. It sucks, yep. I had trouble sleeping, concentrating, body changes that are embarrassing to mention, lol. Lots of things. Irritability, hell yes.
But....you have us. Stay hydrated. Very important. When you crave a smoke, try to vape through that. If you light up, don't sweat it. Just keep the vae handy, too. I also went from 18 to 24. Very soon after that switch, I landed back at 18. I'm now at about 9 or 10mg, depends on what I mix. I did that slowly, though. It's been a little over 2 years now. I never thought I'd be able to stop smoking. I smoked for 30 years.
You will get beyond that tough point, too. It's all pretty normal, though it sure as hell doesn't feel that way when you're going through it. That's what smoking did to us. Now we're un-doing it, one day at a time.
So glad you're here!