I know it can be a symptom of an infection, but if you've had it that long with no other symptoms, I would guess that it's not an infection. Are you going to your GP before your smear, or can you book it for earlier so they can check it out at the same time?
I wasn't going to, not sure I can get an earlier appointment - need to have one when DH is here to take the girls. Too busy between now and Christmas.
But no, no other symptoms if anything untoward, at all.

Well I know everyone else is going to ask this... any chance at all you are UTD?
Always a chance! But no, not a huge one, and none other of my regular pregnancy symptoms at all. Will grab a test just to be sure, but I highly doubt it.