Help? Worried.

Okay so I have always had a pretty good sex life with my boyfriend. It’s easy for me to get turned on and he always makes me cum. However for the last couple of days it hasn’t really been the same. He’s been doing everything right but for some reason I just don’t feel pleasure. Even when I touch myself i feel nothing. It’s affecting us because he thinks it’s him but I’m still attracted to him as I have always been. What could be going on? I’m really worried.