Back to school?

I've been thinking long and hard about my future... things like I only have a relatively short time on this planet to make a difference... a change for myself, a change for others around me... sometimes its big things that make people stand up and take notice, other times its the smaller bits and pieces that make it all worthwhile!
I am at work and I feel a little bit like others have more control over what I do, how I do it and all the rest when the last time I checked, I'm the one living this life... as I once said to my sister, there's a difference between living and existing, and she took these profound words and decided to join a university!
Perhaps I've gone down this road long enough and I've seen the signs and continued merrily along my way regardless. Sure I've turned left when I could turn right and sure, perhaps I could have turned around at any point, but now I feel almost like I'm running on empty doing the same thing over and over again and not really getting to enjoy it the same as I once did, I'm wondering if I should go back to school and try to find something that really matters to me and firmly get my head around what I want to do for the next chunk of my life.
It's quite scary, not in a bad way, but pressurised and crucial to make the right decisions. It's funny that quite recently I read somewhere how we spend the best part of 18 years in education and get 15 minutes with a careers advisor. The real learning comes outside of the classroom.
It's not like times running out, but I want to make sure each step I take is precise, measured and justified so that it comes back with the right results. Nothing's ever certain in life except failure if you don't even try... so I'm hoping to have a decent chat with a course advisor at college and try to figure out if there's something I can use the skills I've learned outside of the classroom. Maybe this is going backwards according to some, but I'd rather ask the questions and be the fool for five minutes than stay quiet and make no effort to address the situation and remain being the fool for the rest of my life!
I wonder if anyone else out there feels the same or has any tips on what I should do?