Please don't worry, I can understand something like that upsetting you, but it does just seem to happen for some reason. Daunted is another person who has been much troubled by cold sores, amongst other things. As Timea says, though, you will probably find that the healing time is much reduced: I have found this also with this years first crop of insect bites: not only are they much less severe than before, but they clear up much quicker. You might also notice that your fingernails will start to grow more quickly: a nuisance for me because I play the 'cello, in an amateur kind of way, so have to keep them very short to avoid damaging the fingerboard.
You have a very wise GP, as do many people in Canada, it seems.