Is this for me?

I'm currently at mid-term of my first semester in nursing school. I'm 25 years old and this is a career change for me. After some research and speaking with a few family members that are nurses, I thought that going to nursing school would be a good decision for me. However at mid-term, I'm not so sure anymore. Obviously there are PLENTY of different stressful situations but at times I find myself thinking "What am I doing here? WHY exactly am I doing this? Do I REALLY want to do this?" I understand it's a great career, but I feel like the only thing that is keeping me going is the fear of being out of work again, not having a career and not knowing what to do with myself. Should I stick with it? I know its only my first semester but I can imagine how I may feel further down the road. If the basics are getting to me then I am not confident I will be able to deal with what is in store down the road.