If you're doing well on your program now and have made up for your previous grades, keep up with that. Some programs do not look only at your overall GPA, but also take into account your trend. (i.e. low in the beginning and haven't been taking school that seriously when you're young and boosted up when you became serious with school.) Also, GPA is only one part of the equation. They will look into your ICU work experience, any committees that you joined, what type of leadership skills you have, how well do you work with others, your recommendation letters, and if you have precepted (those are the only ones I can think of right off the bat). But for now, keep doing what you're doing, try not to obsess too much over it, focus on finishing your nursing strong, and get an ICU job when you finish.