I think I want to be a nurse instead

I have been going to school for 2 years so far and was going for teaching, but today i am having second thoughts i think i would want to be a nurse instead. i hear teacher talk all the time how they dont get paid enough or this just aint worth it and some of them are telling me to not even be a teacher. I am just afraid that i want make it because i hear people say how hard it is. i have no experince at all. I am so confused but i feel in my heart that i would want to be a nurse and can see my self being a nurse besides a teacher. my BIG concern is..... will i be able to do it. i doubt myself all the time and i know thats not good to do.