Getting Out of Your Head

Yesterday I posted some symptoms I was experiencing and I was essentially told I was probably ovulating. So I had mentioned it to my SO so obviously he wanted to BD. Problem was I couldn't get out of my head and enjoy it. Allow it to be two people just showing affection towards each other. All I kept thinking was "is this it?" "Should we be in a different position" "Will we finally get pregnant?" "Ashley just let yourself get pregnant" it was awful; something I have yet to do or experience. I can't even say it's the app, because I felt the symptoms. What can I do to get out of my head? We want this SO bad (I know you ladies understand that!), and I have a 40ish day cycle so it's like I don't have as many opportunities to conceive.