I am 23 and completed 3.5 years of college (I'm having money problems at the moment so currently I am not enrolled in school). I am a relatively smart person but I seem to lack common sense. I just don't seem to think sometimes. Why is that? Also, I occasionally have a hard time listening to people. Someone will say something to me and I have to ask them to repeat it or I just don't hear them, almost like I'm tuning them out. What's wrong with me?