I have been 'fitted' three times; at 4 months, 5 months and 6 months. A word of warning, especially if you are a busty girl, get properly fitted at Myer or DJ's NOT Bras n' Things. I went this past weekend to be fitted since I was falling out of a 14E that I had been 'fitted' for and was fitted to a 12F. The DJs lady was fantastic, explaining HOW it should fit, when to move the clasps and making sure I had a little room to grow in the cups. She had a look of horror on her face when she saw the bra I was wearing and found out I'd been fitted for it. She apologised, even though I had been fitted elsewhere! I tell you, the difference between a properly fitting bra and a poor fitting bra is AMAZING. My boobs no longer ache at the end of the day, neither do my shoulders and upper back and I don't have a bra riding up toward my neck either!

DJ's and Myer might be a little more expensive, but the difference is worth the extra expense IMO. I am rather busty though so it was probably more noticable for me than it would be for a smaller girl.
Just wondering what bra you were able to get in a 12f????? I am in a 14E because I could not find any 12F on the rack anywhere and I am getting sick of the band being too big on my bra and riding up.
Thanks Mel