I am 1 month out of surgery and was just wondering how long your breasts continue to shrink after surgery

I am 5'4 107lbs and 20 years old with no children. I originally went in for surgery because I was a very small 32b and was tired of wearing victoria's secret bombshell bras to get the look I have wanted since I was a little girl. When I went in for my pre op I tried on sizers and was stuck between 275cc and 300cc because at the time I only wanted a natural look and was scared of going too big. Eventually deciding to play it safe and went with the 275cc. But now after 1 month of post op I am worried I went too small! Especially since I have heard that your breasts can continue to shrink up to a year after surgery! Just wondering if that has happened to anyone or if anyone else has felt the same way after getting their BA?