I have a vague internal monologue, sometimes it's almost non-verbal, hard to explain. That isn't to say that I am not aware of my internal thinking, it is mostly abstract/conceptual, visual/sensorial. Having said that, I am somewhat introverted and never felt that expressing my thoughts into words sounded like it was in my head, especially with written word. The more I think the harder words come out. I've toyed with creative writing and I do best when I don't think at all and write whatever comes downstream. I've always been like this or at least I remember I was like this when I was like 7. Sometimes when I am stressed out, I use words to ground myself or find a solution but it's all involuntary. I'd ask myself "what have I learned from this or that" and the answer is like a video playing in my head, with images and sounds but not quite words..