Breast implants? SO not comfortable.

Has anyone ever had breast implants? I am really considering saving up to buy some, how much does it generally cost? I really really want to get it done, I am a 36 B cup and after having my son my boobs are the same size but saggier. I feel unattractive, I hate my breasts. My SO doesnt want me to get it done, he says he loves them the way they are but idk I dont really believe that. I'd like to he a nice 38 C if possible. Any advice about the surgery, cost and just advice about my SO not being ok with it would be great!