The sore throat can also come from your base liquids. I find straight PG kinda harsh now, so my juice is usually 60/40 PG/VG. Keep it up! You're over the first big psychological hurdle (proving to yourself that these e-cig thingies really work & can replace 100% of your tobacco use). Have you gotten the sudden urge to wash everything you own yet, lol? If not, it's coming.
And beware fast-food. Your sense of taste should have almost fully recovered by now; you discover why they call it "junk food" when you can actually taste it.