I do not think it's ever too late to go back to school. I think learning is important and I don't think we should ever stop learning and growing. I have had many other classmates in my local community college who were in their 30's and 40's, they inspired me and showed me that it's never too late to learn something new. Learning new things and challenging oneself, could possibly help keep the mind young.
Its never too late. If you believe in your ability and if you are interested in the field that you are currently doing your studies then success if going to knock your doors . Its your interest that will make the difference.
I wish you all the best.