I've gone through very similar things...I think your symptoms sound very much like depression. You sound a lot like me and how I was in school. I ended up dropping out before finishing nursing school because of confusion, indifference and fear.
I still deal with depression and have since started back into school. There are those days that I just can't make myself work on my projects...but the way I get myself going is by asking myself what I want. The answer is always, "I want to make more money to make a good life for my kids. In order to make more money I have to finish school. In order to finish school I have to get good grades. In order to get good grades I have to get out my book and study or work on my project." Breaking it down like that seems to help me get moving.
I decided that part of my confusion came from the fact that I'm not sure what career would make me happy. The fact is that no job is going to make me completely happy because I'M DEPRESSED NO MATTER WHAT I DO. So I decided to stick with my original career path (nursing) and remember that my feelings of depression don't mean that nursing is wrong for me. Those feelings are just something I have to manage.
I hope that's helpful. Good luck!