Best for Breast growth?

I'm 22 and I had decent sized boobs when I was younger (around 17) not huge by any means, just a solid B edging closer to C, I started taking the pill and they stayed that size. Since stopping around 3 years ago, my breasts have shrunk to an A cup, and even some As are gapey on me. It's not due to weight loss as I've had very little weight fluctuation, it's really starting to effect me emotionally because I've become very insecure. Breast implants have never been something I'd consider, just wondering if anyone knows which contraceptive pill may be best for breast growth as I know some can help with that, plus I also do want to get back on it for contraceptive purposes. Thank you 😔