Re: postnasal drip,sore throat, white spots.
white spots in the throat are not the same as "tonsil stones", and do not always signify strep throat. in fact, only a small percentage of sore throats are actually caused by strep - the rest are caused by viruses. it sounds to me like you just had a virus. many times i've had a really bad sore throat with white spots and thought "oh, this must be strep!" and then to my surprise the strep tests come back negative.
so, white spots in the throat are not always signs of strep, but it never hurts to go get a culture done at your doctor's office to be sure if you're not feeling better. but since you ARE feeling better, it's probably not strep, and it's good that you didn't have to take any antibiotics because they wouldn't have helped a virus and taking them when unnecessary just leads to antibiotic resistance (and you don't want to develop that!!).
anyway, i'm glad you're feeling better! i know sore throats are the worst!!