Disappointing sex

My SO and I have been together for 4 months, been having sex for 3. Every time he blows my mind, exceeding my expectations of how great sex can be. However last time we just got home and he was really in the mood but I was tired, but I decided to do it any way. I had orgazems but after I felt kind of empty and upset... like somehow it was wrong... I don't know what to think I just can't understand what happened, I just know I'm upset.

Should I talk to him about it? I'm scared it will make him feel bad