Feeling flushed:(

I know this is a lot but I need some help. About an hour ago I was feeling nauseated and I threw up. But the strange part is that my vomit was its normal yellowish color but it also had a lot of dark purple or may even look black throw up. And I'm currently 11 weeks pregnant. Has anyone ever experienced this before. What's so crazy this is my third child well almost after 9 years but I never remember threwing up anything that was dark dark purple or black.