Dude, seriously, drop the nic down to human-tolerable levels. I suspected you might be hitting 18mg, but 26mg is just crazy and the source of all your discomfort.
A few years ago, you might have needed to run that much death extract just to get any addiction relief out of the clearomizer technology of the day, but these days, well, it's just crazy.
And I have to ask, do you have any taste buds? Are you maybe also getting burnt hits due to a worn-out wick, exacerbated at higher watts? That'd do a number on your throat as well. You do know you have to change coil heads on a regular basis, right?
If it sounds like I'm being patronizing, it's because, well, I am. Anyone who vapes 26mg to the point it causes extreme discomfort and then blames the power level of their mod is going to be in for a little of that.