25 Years Old, Two Children, AA Cup to Small B Cup, Mentor Memory Gel Silicone; Will Go Bigger

I was practically flat chested due to my breasts shrinking so much after breastfeeding two children. My doctor claimed that he couldn't go bigger because my muscles were tight. I had 150cc memory fell silicone into the left breast and 175cc into the right breast, both under the muscle. My initial goal was to become a C size which didn't happen. I woke up and didn't pay attention to my breasts until I arrived home. I was unhappy. However, My doctor claimed he couldn't make me bigger due to my muscle being very tight and he wanted a more natural look. I keep asking every time I go for my checkups about going bigger. I still feel like I am soo small and it doesn't even look different. I am not happy but I am going to go bigger in a few months and maybe I will be happy then. But I will definitely use the same doctor !