I agree that something is really wrong here. My guess, as for others, would be that this pregnancy was unwanted, and they're not happy about it.
However, I'm not sure you can do anything more than what you've done. She obviously doesn't want anything to do with you, and is blaming you (and lots of other people) for things you haven't done, said or meant.
What I might do is write her one more time. Tell her that you didn't mean to do anything to hurt her, and wish her only happiness, but have been really worried about her. Then tell her that you accept that she no longer wants a friendship with you and will no longer bother her, but will be there if she changes her mind.