Depending on how my day has gone, I have cut down to about 6mg juice, and also frequency of vaping.
But when I started, NO cigarettes from day one, I was a 60-80 a day smoker! I started out at 16mg (I had no idea what that was, but didn't seem like it was enough) so went to 24mg/ml juice and was instantly happy as a clam. And I was vaping constantly!!
For two months I could have cleaned out all the food from the local Piggly Wiggly, had a kinda fluttery hungry stomach, but toughed it out! Little by little I got a grip on myself, stopped coughing my head off, smelled better (you're right, that last cigarette while the battery was charging ~ HORRID! Couldn't finish it. Had to shower and wash my hair out again! And had enough energy to finally get back to work as a plow horse!
E-cigs saved my life. I never could have given up cigarettes without them.
I bought every brand and style there was, finally found my favorite, and learned how to mix my own juice because my supplier quit making my favorite. Started in June cutting back on nicotine, again in September, with NO MORE WITHDRAWAL!
Know the first thing in my head in the morning now? Putting on the coffee.
You may find some comfort in making sure your diet includes LOTS of fresh veggies, anything anti-oxident, fruits whole and juices, stay away from carbs white flour and sugars. And BREATHE! Lots of pursed lip breathing to get those lungs opened up. And some power walking. I hadn't slept well for years, but after a couple weeks I started sleeping like a baby again. Cry if you must, keep your "flash" temper in check, and learn to just relax, and vape like a fiend. Keep lots of juice and batteries and atomizers on hand, just to keep away from that panic factor that plagues a "dependant" person.
Best of Luck!