Shellsters, I would definitely give it time. Brassard says four months *minimum* before there's even a chance of getting an idea of what the final result will look like, and even then it'll be a year or more before the result IS final. Seriously, what it looks like now will probably change almost daily. Swelling in particular can make the labia stick out rather than draping properly, which leaves the vaginal introitus more exposed than is desirable. Please try not to worry too much so soon.
Tina, I think you might want to research the surgery more... but for the record, the vagina is formed by making a space through the muscles in the area, and these are the same muscles that cis women use to squeeze something in or push something out, so trans women by definition have those muscles surrounding the vagina. (I can eject a dilator with some force, or squeeze my wife's fingers until she starts to lose circulation.) That's true of any surgical method, too - the vaginal canal pretty much has to be in that location, regardless of the other details.