I am having a few problems lately, and it's been within the last 2 years

1) I talk to myself, OUTLOUD. I don't even realize I'm doing it, and I don't know why. My mouth moves and I have expressions on my face. It's like I'm day dreaming, but I do it in front of people and I don't realize I'm doing it until after i'm done doing it. I think about things like work, and how things will play out, but how can I stop talking to myself? what's wrong with me?

2) I cannot pay attention to anything in class for the life of me. I cannot pay attention when I read, I get side tracked easily, and I cannot remember anything short term. I walk into rooms and I forget why I'm there, and it's not like it happens a little, it happens a lot. It's like I'm loosing my mind.

Anything you think it could be?