I would research what are the requirements are for each school, and what are the required courses, as well as a entrance exam. Your science grades should at least have a GPA of a 3.0, as many posters have stated.
I challenged my science courses, and had a 3.0 GPA, and an overall GPA of 2.68 when I applied for a BSN program. I also had to take the NLN entrance exam, and they wanted me to score a 90 percent on the exam (got 92%), I got in.
It took me 12 years to get my BSN. I failed NS at 19. I had test anxiety. I started over, went to PN school, worked, then went back to an accelerated BSN program, and graduated. Passed the boards, and I am working as a pediatric critical care nurse. I am 32. Remember it is all possible!
Life is a ride full of lessons learned. Use your setbacks as strengths to meet your goals. You are still young, yet you have a plan now. Focus on your goals, find out what you need to do, continue to meet your goals, and everything will fall into place.