Ah, we're talking about "the Voices" again 
I used to have a horrible problem with those voices, especially during my first year of real running. I always ran with music or music podcasts. They seemed to help quite a bit. When my Nano stopped working, I had to decide if I was going to buy a new one, go back to running with my phone on my arm, or learn to run without music (horrors!). For a while I used my phone, but I really didn't like the phone sliding down my arm (the band had stretched out and my arm had shrunk). So I started playing little tricks. I counted steps. I sang songs in my head. I repeated a mantra. Eventually, I relaxed and started to look at the wildlife around me (I counted different kinds of animals or birds), study the other people on the trail, listen to my breathing, or just try to really be present in my surroundings during my runs. Now I tend to use my time out on the road/trail thinking - about life, how to solve personal issues, what I'm going to make for dinner, what I'm going to do about my hair, even how my feet feel hitting the ground. When the little voices creep back in, and they do, I tell them, "no, not going to listen to that, keep moving."
Do whatever works for you to keep those voices from taking anything away from your wonderful time running.