Hi there, fellow Michigander
I, too, am pursuing nursing, I also got bad grades when I was in high school. I had a lot of problems then (I'll spare you the drama) and now that I am back in school, I'm pulling A's. I actually CARE about school now, and it means a lot to me to have the best grades I can. Not only for myself, but for the program as well. Nursing programs are very competitive all across the country, and Michigan is right there with them, especially with our unemployment rate growing.
My only advice for you is to make sure that nursing is really what you want to do. You mentioned that you have two small children - are you a single Mom as well? Nursing (the job), pre-nursing classes and the program itself are incredibly stressful and require almost all of your time and devotion - especially since the competition is so high. I would suggest reading through some pages here and get an idea about what nurses do and the stress factor. I would hate for you to put money and time into pre-nursing classes, only to realize that it's too much for you, and you'd rather take care of your family.
There are other health care careers that are just as booming as nursing, that many people are overlooking: radiology technician, surgical technician, etc. Baker College has both of those programs, and I believe Macomb Community College does as well.
Some links for you to check out:
Need Honest Opinion -- Would You Recommend Nursing?