My best friend had a nose job and I was VERY sceptical about her going having plastic surgergy. But it's without doubt the best thing she's done, her confidence has improved ten fold and she looks more beautiful than before because of this.
I'm not sure of the exact price she paid but I think it was in the region of £3500. She had a consultation with the surgeon and 2 weeks later she had the op. Her swelling went down within a week (black eyes, bruising and tenderness around the nose area etc) I think she had her stiches taken out a week later. Obviously it's something that should be done to improve your own self confidence rather than for anyone else's benefit.
I can't really comment on the pain as i've not experienced it but I do remember my friend saying it was nothing and it was more uncomfortable than anything else. She had her nose packed and she said that was a little painful when they took it out but I nothing she couldn't cope with. Within 2 weeks of her having it done it was impossible to tell she'd had anything done!