Hi, I think you are very normal! I talk to myself all the time. I have conversations in my head and sometimes I catch myself saying things out loud. Sometimes when I am alone I deliberately speak out loud. If I haven't had any alone time for a while, I begin to get antsy and find I need that space to talk! I don't think it is indicative of a mental disorder, it is just a way I have found of processing stuff. My child does it too.