And it never even occurs to them that it is a heartbreak to think about from someone else's perspective.
It is a very strange phenomenon. Being pregnant can be terrifying and even women who try for years get freaked out and have regrets when they are pregnant.
I am actually preparing myself for this reaction. Which would be absurd after 5 years of TTCing and all kinds of failures and sadness and frustration. But I think it can happen. The whole 'what have I done' thing that Blessedthistle brings up. Almost all people who say things like that don't actually mean it. Babies are very abstract until they are live creatures in your arms.
But it is very insensitive. People just have no idea that pain they cause. I'm sorry you felt bad.