33 yr old, Mom of two who breastfed....304cc

I've always had smaller breast. Most of the women in my family do. I was an A cup almost a smal B before children. After pregnancy and while breastfeeding both my children I was a C cup. That did not last long and I ended up with extremely saggy breast and a small A cup.
My stats are:
5'9
120lbs
34A
I had my consultation in Dec. and Dr Orseck recommended 280cc or 304cc. Silicone under the muscle since I do not have very much breast tissue. My pre op appointment was February 27th and after looking over many other reviews on here of women with similar stats I decided on the 304cc. I'm pretty modest and fear of going too large for my small frame, but I also worry about going too small.
My surgery is set for March 9th.
My husband is very supportive and so far most of everyone you knows has been also.
My goal is just to have all this loose skin filled. It has been uncomfortable having the saggy breast. I also just want to feel like a woman and not a young flat chested girl.
I will post my pre surgery picture later.

Getting nervous about choosing 304cc even though my nurse said that is still a very moderate implant size. It helps to keep following other women on here with similar stats who also went with 304cc.

Here are some wish boob pictures I saved.

I'm getting so anxious! 5 more days until surgery day!! Here are some before pictures I have taken of myself before. I cannot wait to finally have breast, feel and look more womanly. I feel like I look like a young girl right now.