Have you had the chance to shadow yet? That can be a big factor. I was convinced I wanted to be a medic until I followed my sister (who is a nurse) around the ER. It totally changed my mind.
You don't have to go to the floor. You don't have to stay on the floor for the rest of your career. You can work in surgery, radiology, IV team, cath lab, ER, ICU, wound care, etc. The floor is only one option. I knew I wouldn't be happy on the floor...so I didn't go there.
If you don't like the hrs, remember that the hospital is not the only place you can work. You can work 6-8 hrs a day in a plastic surgery office. They have no holidays or weekends. You can do home home health. You can work 8 hrs shifts in recovery. Many part-time positions allow full benefits and that is only two shifts a week.
If you haven't seen any schools
that require less than a 3.0, come to florida. There is a university right down the road that requires a 2.5 last time I checked.
The people that regret nursing are the ones who didn't want to go in the first place (mostly). They went to nursing school
because their friends did it or someone mentioned it in passing over dinner.
You have to decide what will make you happier. Why did you decide to go to nursing school the first place? There had to be something that pulled you away from business. What is making you think that business will be better. Something has to be driving you.