Droopy post baby - how to improve without implants?

when I was pregnant I went from a B cup to a DD. Now I have completely deflated and am very self conscious of my 'spaniel ear' droopy s. How can I get them perky again without implants? I have heard of a type of surgery that makes a 'natural bra' out of your own skin but I dont know anything about that. I know they will never be like when I was 16 but I would like an improvement and I would love to hear any advice. Thanks.