Is it normal it have a brain like this?

I have all ways wondered if the way my brain works is normal. There is many times in my life I thought my experience in life was normal. But the older I got the more I realized it wasn't. So I was just wondering is this normal? It is hard to explain how my brain works but I will do my best. It's like having a box in a box in a box. I can talk to someone and have a full flowing conversation with them. But at the same time be thinking of something completely different, like what else I have to do today. The thought and talking is completely under my control and although they are different I can hold both without much trouble. At the same time I have a second string of thoughts. It's not as loud nor can I really control what it is thinking. It's wild and goes every where but its the part that brings me answer. Like a said. It's like a box in a box in a box. All three can go at the same time. Although if the inner thought gets to loud, I tend to stumble on my words. It doesn't happen often though.