Strep is a bacterial infection. You don't get immune to it, so it can occur again. If you had strep you would have a fever.
Warts on the throat aren't very common.
Tonsilloliths would be my guess....
But if it is a problem, see a doctor for a real diagnosis
you have pore's in the back of your throat like you do everywhere,and this might be a nasty term but when you have even the most minor throat infection puss can fill up in these pores.Does your throat have the least bit of discomfort?I honestly wouldn't worry about this because you can't get hpv by kissing first of all and second if i were you i wouldn't worry but if these "white spots" get any bigger then they already are and don't go away within about a week i'd go see a doctor.hope i helped