Weird Sex Experience

My husband and I had sex today (which I initiated as usual) and during and after he just seemed distant. While we were doing it he wasn't his usual self. He was very quiet and to himself. Right after we finished he went straight to the other room to play a video game... I asked him if everything is okay and he said yes he's great. It totally doesn't seem like it though! I don't know if I'm not appealing to him or what's going on, but it doesn't feel right. Anyone that can relate or any suggestions would be appreciated!