Felt nothing during sex. TMI?

So last night i was all fired up and ready to have some fun when he got home but he was so tired it did not happen so this morning he wanted to give me what i wanted last night. The only problem was.... i felt nothing. I could barely tell if he was in or not. It was like my whole body was numb. I wanted him but i got no pleasure or anything out of it since i could not feel. He felt like he was failing me. I was excited and ready it wasn't like i needed to be excited more. I was plenty lose. Most of the time he has a hard time even getting in since i tighten up so much. That was not the case this time at all. He easily slid in. I have never had this before i normally feel every little thing. Why? what happend? Has this happend to anyone else?