When I had my wedding dress fitted I went for two alterations. One was done about a month prior to the wedding and then another one that was one week prior to the wedding. This worked out great for me because I was in the middle of losing weight at the time.

(Of course...I got married and started cooking up a storm for the hubby and gained every last pound back...ugh!)

Good luck to you and I hope that your dress looks GREAT on you!