Breast Lift at 24?

I am a 24 year old mother of 1.  5'4 and 145lbs.  I breastfed my son for 8 months and as things usually go, it changed my breasts not for the better.  I have surgery scheduled on July 5, and as the date gets closer I am getting VERY nervous.  My plastic surgeon said that I have too much sag for submuscular placement, and he was worried that my breasts would hang off the end of the implant.  He suggested doing subglandular placement, saying that it would give my breasts a nice lift and look very natural and that he really didn't want to do a breast lift because I am so young and that my breasts still have a very nice shape.  He said that I have ample breast tissue for a subglandular placement and if I wore support I will be fine.  I keep reading stories from women who say they have needed multiple revisions because of sagging and rippling associated with subglandular placement.  I also read that it has a higher risk of bottoming out and capsular contracture.  I would love some feedback about my situation, and if any of you have had good or bad experiences with subglandular.  Thanks for reading!