Help !

Please dont chew me out.... I'm pretty embarrassed to be sharing this but I need some advice. I decided to hook up with this guy, he kept joking about getting me pregnant.... I thought he was kidding until we actually get to the act & I found out he wasn't even wearing a condom. I always use protection so this guy really tried to play me... When I asked him why he would do such a thing he said because I want a baby already... a mixed baby.... I about lost it... So now I might be pregnant by a guy that I only knew for one day I'm hella upset about it... I don't know what to do... I did take plan B but I've been reading things that it may not work... I'm freaking out really I don't want a baby with this guy. I feel like he saw that I'm doing well off on my own & was looking for a way to be set in life... This guy tried to trap me with his baby.... Total disregard for my anger about releasing inside of me... what should I do ?