I would say it would be rape because she told you to stop and you didn't. Technically, it is rape....I just think you were being a dick, but the way I see it, anyone can say that you raped them. However, a guy can't really say he got raped, only a girl can. It's just a messy situation. You need to be careful who you sleep with and take measures to protect yourself legally.
I will do my best to reply with an educated, humble and honest answer. Ultimately, it is up to you whether you want to listen to my advice or ignore it completely. Sometimes, my advice may be wrong; occasionally, it will be right. Regardless, I want to do my best to give people answers they are seeking.