Applying to nursing program after I get a business degree?

Sorry this might be kind of long. I am currently a student at SF State, and I will be going into my junior year in the fall. I am still undeclared, and will have 52 units in May at the end of this semester.

I have recently discovered my interest in nursing. I also however, have an interest in business.

At my school, you cannot apply to the nursing program once you have 96 units. By the time I do all the nursing prerequisites (I have about 5 classes I still have to take before I can apply) I will be really really close to that 96. I am also worried that after I rush to get the prerequisites done in the next year, there's always that "What if I don't get in?" chance, which is high considering over 1,000 people apply for only 80 seats.

So, I came up with an idea to spend the next 2-3 years completing a business administration degree. At the same time, I was thinking I could do the prerequisite nursing classes. Once I graduate with my business degree, I was thinking I could then apply to the community college nursing program in my city.

I worry though that I am wasting my time and money. If I do business and do nursing right after, then was the business degree a total waste of time if I'm never going to use it as a nurse? Or, if I try to rush into nursing now, what if I don't get in? Then I'll be back trying to do business, and it's going to take me like 10 years to graduate!

Sorry this is so long, I am just feeling extremely lost and upset recently, wishing I could go back in time and do nursing from the beginning 2 years ago when I started college. I honestly don't know what to do. Hoping someone else has had a similar experience and can give me some advice.