It's a silly question but I don't want them to shrink

I hated my boobs for most of my teen years and only started liking them about a year ago.
I've gotten thin before from not eating much and breasts remained the same, but now I'm working out I think they're getting a tiny bit smaller. I'm not too fat, but rather flabby with belly fat.
I'm worrying over something silly, i know, but have your breasts shrinked a lot?