Growing up isn't all its cracked up to be...

Well its the third week classes and I am so far really digging all my classes, except for maybe history...which is kind of slow to start out. But psychology and sociology I find really interesting. I am in my second year of university and I have always known what I wanted to do, it has always involved working with children, first I wanted to be a social worker but then realized that its a very emotionally draining job and I wouldn't be very good at leaving my work at work, which most people say is a key thing. So I picked the next best thing being a teacher, manly a elementary teacher, But I have been a little conflicted as of late if I really would make a good teacher and if there is a lot of job security in teaching. I have talked to many people all with a different opinion on the matter, my sister is a teacher and she is only in the first 2 years of it as a substitute, which I know most new teachers have to do for a while. So I have her telling me, that right now its not a good job to have, and then another person tells me to stick with it because so many teachers are going to be retiring in the next 5 years, which is about the time I would be graduating. I have often thought that if I didn't do teaching I would still want to work in a school as a counselor, because psychology has always been one of my interest. WHAT TO DO... WHAT TO DO! I always said I wasn't going to be one of those students who went to school and kept changing there focus or major....and here I am trying to make a decision that may turn me in another direction. At least I haven't declared a major yet...but its almost scary to think I could be changing how I thought things would turn out. I don't like change!!! But I don't want to be stuck in a job that makes me miserable or unhappy with my life when I am 80 . Anyone have a helpful opinion that could point me in the right direction???? OPEN FOR SUGGESTIONS!!:)