I'm pregnant and swallowed an orange seed I just wanna know is that bad?

Not a problem. An orange seed is not a problem if swallowed accidentally, regardless of whether a person is pregnant or not. The only problem with accidentally swallowing fruit seeds is the choking hazard, which doesn't happen with little seeds. One can also just stick to navel oranges, which are seedless and easy to peel!
No. Orange seeds will not be any problem! congrats on your pregnancy !