I'm not sure how you can stop worrying but I personally think there's nothing wrong with having scars. I think most scars can look pretty good. I've got a few on my face (admittedly small ones) and I love them, I think they give me character. But a lot of people think I'm weird when I mention this!

Trying to look at the positives might help, like you said you've gone up to a C-cup (I'm jealous). Almost everyone has stretch marks but I rarely notice them on other people. And even though my own stand out so much to me none of my friends have ever noticed my stretch marks. And the bloating will go away after you've recovered.

You could try and distract yourself too. Find a good book maybe?

Hope that helps a bit!