I'm pregnant... help??

So I had sex with this guy and we used protection. Me and him barely know eachother. We went to school together and that is it. We've hooked up a few times but this time I feel completely horrible. A pregnancy test said positive. Remember that I am 16. I know I shouldn't be doing this stuff and I regret it now. He always jokes about being a teen dad but I don't know how he will react when he is one... What do I do? The guy is very sweet but hangs out with douche people. I don't know what to do.