Why can't I get off from a quickie?

Last night, my partner（31m） and I（25f） had a quickie in his car. It was my first time doing a quickie. Before that, I was very excited and wanted to try it. I even encouraged him and said that it would be hot. But I clearly didn’t realize what he meant when he said a “30-second quickie.” It really was… 30 seconds.

Instead of feeling full and satisfied, I felt sore when I sat down on him. I thought if I waited, it might get better. But before I even raised my concern, he had already finished inside me. I didn't even know he finished because it's also my first time doing it without a condom. When I went home and took off my panties it's his cum mixed with blood.

After that, I just felt such a big drop. I told him that it hurt…and I bled a little. He said he wasn’t sure what to say.

It just wasn’t what I had imagined. It wasn’t pleasant. It was even a bit painful. This had never happened when we had foreplay. He would always use his fingers or tongue on me. I don't know if this is because we don't have foreplay? I think I was wet enough, though. Or because we are too nervous about getting caught? I know I agreed on this, and I just feel so stupid.