Anger sex?

My gf recently fucked me pretty roughly and I only found out after that she was angry with me. She did ask my consent beforehand and I stalled for a bit bc I was feeling a little distance between us but I went with it in the end bc I wanted to make up with her. It was good sex, just unusually rough, so I brushed it off at the time. Rn I'm just feeling kinda used? I don't like that she touched me out of a place of anger.

So idk what this situation is exactly but I'm just really uncomfortable about it and I'm not sure what to do. Any advice?