If you want something to help you with the pain take an asprin or paracetimol before you go, it really helps trust me it helped when I had mine done (see my album).
It's really pretty and I'm sure you'll be fine, the pain isn't as bad as some people make out but then apparently I have a very high pain threshold.
It ususally takes 1-2 weeks to heal dependent on where the tattoo is, so being on your wrist it shouldn't take to long at all. You'll have to put piccies on here of it when you get back hun!