I met a woman recently who had some kind of weightloss surgery. She went from being 300 lbs to having a figure she obviously feels very happy with, and so she should. She is also completely open about it.

I'm happy you are doing whatever feels right to you. There is nothing to feel ashamed about at all. I think the fact you are choosing to be proactive, and purely for yourself, is a really positive thing and something to be proud of.