Even now, only 2 weeks later, you're probably too swollen to figure it out.. I was told that I would be swollen for 3 to even 6 months later! It all depends on how your body heals and adjusts to the change. Once your swelling has gone down completely, and your surgeon can give you a better estimate on that as they follow up with you... you can search the internet for sites on how to measure exact bra sizes, there's a few really good sites out there that will walk you through step by step.. but remember, places like Victoria's Secret don't always match the "true sizes."