I wanted to mention that your being encouraged by the NNPs you work with is a huge vote of confidence in your ability, your style,your intelligence, and your personality. You must stand out in some positive ways or they wouldn't be encouraging you. I wish you the best in whatever you decide. Continuing your education won't be easy, but I bet you won't regret it.
PS I will be 50yrs old when I graduate with my MSN in May and sit for FNP boards. I have loved the challange and look forward to the new opportunities that await. I'm a late bloomer!