Oh, gosh You expressed your doubts clearly to him that you didn't think you should have sex... He completely acknowledged this by repeating this blatant opposition to having sex with him and laughed about it. Almost mockingly. TO me, it sounds like he only did what he wanted to do as he kept going, disregarding how you felt about it. It sounds like you DIDN'T consent, in my opinion.

Also, when it comes to a situation like that, it doesn't matter whether you try doing something about it or not - you said you didn't want to but he continued. He knew you didn't want to but he still kept going and laughed. There are so many articles out there which go into detail about this for you to personally and privately explore which might feel better for you rather than being asked invasive questions publicly on a forum.

I really, really, really hope this helps in some way and that you get some answers