Never had one before (obviously) and I'm 27, so really should have had one before now but in my defence it hasn't actually been that long since the docs sent a letter about it.
Don't really feel that bad about the process - I've had a vaginal swab taken before in my teens and the process seems similar - i.e. speculum, swab etc, but that it's got the chance of hurting like a bitch :( I'm pretty laid back about this kind of thing but paranoid now that it's going to be agonising!
Worst bit about it atm is that I had an...ahem...tidy up down there a couple of days ago but made the drastic mistake of shaving the old bikini line and christ, it's like the apocalypse happened down there and I'm covered in a horrid looking shaving rash...that's way more mortifying than the actual smear!!
Very tempted to cancel it and rearrange for next month and don't do the tidy up next time, I know they have seen a lot of variety but, god, no one needs to see this!
Doesn't help that DP was meant to be having one at the same time in solidarity but can't as she's come on 