I will also be starting my prereq sciences for my local nursing program in the spring. I just changed majors from Human Services(I was 75% complete with that before changing). I basically just have the sciences left, but because they weren't required for my previous plan I am starting from the bottom. The prereqs FOR the prereqs for my school are BIO 112 (with lab) and CHM 113 (with lab). I can't do the A&P or Microbiology classes without those so I'm doing those this fall, along with a couple of other classes that count towards the nursing prereqs like Lifespan Development. I'm not worried about those because I've had the instructor and know how his classes are structured, but I am worried about the sciences. I'm a good student with a high GPA, but I would be lying if I said I didn't have the same concerns as you with taking two courses and their corresponding labs. I don't have any advice but we are in the same boat girl. We'll get through it!