Yes this is normal, and you don't need to pressure yourself about it.
I found that when I had this at about the 4-6 month mark in R I was having mind movies, and comparing myself to AP when we were. It ruined sex for a while, then I realized, I had to make it about me. He had to focus on me. I told him this, and he did his best to make sure he was doing everthing he could to keep me focused on the sensations and pleasure while having intercourse. It worked. Of course it turned "making Love" in just plain old Sex. But after we would hug snuggle and be content together.
I am not saying to do this, just giving you my experience of what helped me through this.