I agree with Kimmy, you should probably up your nicotine until you kick the analog habit.
Again, if varies. Sometimes a carto can last me a day, and sometimes I go through 3. Just depends on how often I get a chance to vape, but normally I go through 1 1/2 a day.
<---- Used to be a pack-a-day smoker...
When people ask me about switching to vaping, I tell them it's like smoking again after you haven't for a few weeks. If you know what I mean. Like when I smoked analogs and would get sick and not have a cig for a while, that first 2-3 analogs would taste like crap until my tastebuds got acclimated to it. Same thing with vaping, just gotta get used to it.
The kicker is when your tastebuds start recovering when you quit smoking, then all your PV flavors start tasting different, and you find out you have to switch flavors you once loved.. lol It's a process, but good luck!