Cravings are tricky things, especially with smoking, you have to hit all the numbers - flavor, nicotine, vapor, throat hit. That's why the cheap disposable and Blus don't really work, they're not strong enough to deliver the vapor and throat hit of a real cigarette.
Your sore throat could simply be your throat getting used to a pretty high level of nicotine, vapor, and the flavoring. I would simply wait and see a couple more days, and see if it goes away. We all react differently to switching from cigarettes, and your throat isn't used to vapor yet - it took me a couple days of coughing, a slight pressure in my chest and headaches to go away.
Maybe try a smoother, mellower flavor, as well. Apple Sin might be just too much right now.
I agree that 24 might be too much for you, too. Who are you buying liquid from? A lot of the kit flavors tend to not be very good.
Anyway, keep going on your attempt, you just have to find the right combination of gear and strength and flavor, and you'll forget all about cigarettes.