Primer is the clue Suzy, getting a carto properly primed is probably the single most important thing in setting up a carto either in or out of a tank. The filler needs to be saturated so that the coil has liquid touching it before giving it enough power to make it glow. A dry coil will glow red hot after a second or two of power where a wet coil will not because so much heat is transferred off converting the liquid to steam.
Some things to do, first check the voltage on your provari to make sure you have not turned it up when putting on a new carto. Next check the ohms of the new carto since you have a Provari, sometimes things can get mislabeled and a much lower ohm carto at the same voltage can easily taste burned.
Now turn the power down some from where you like to vape on a freshly filled properly primed carto, you can start all the way down at 3V just to get it going and make sure you have a wet coil. Take a draw or two without hitting the fire button to see if you can taste flavor, this is an indication though not a guarantee the coil is wet. Next do a very short, one second or less press of the fire button to see if you are getting flavor and vapor. Do this several times with some draws without hitting the button at all in between until you are getting flavorful vapor then start giving it longer times on the fire button and heating of the coil.
The whole idea here is to slowly break in the carto and get the liquid flowing good to the coil, once you have that going start bringing the voltage up to where you like it. If the taste gives a hint of burned or too hot for you then back it down just a little and try it there.
Hope you get it sorted, I saw your face hurts thread and it kind of made my face hurt too