Oh my, I need help please

I'm going to be a freshman at UCSD this fall. I am extremely interested and nursing and believe that helping others emotionally and physically is my passion; this is what i want to do in life. I am so torn because UCSD does not offer a BSN because they don't even have a nursing major (i plan to major in human development and get a B.A degree in this). I hope to someday become a Nurse Practitioner but i am not sure how to start this route. I am so confused because some people say that i can apply for nursing schools after i graduate to obtain a B.S, but then i would just feel that 4 years of study at UCSD would be a waste of time. I really do not know what to do. Right now i'm thinking to graduate early at ucsd and apply to a accelerated bsn-msn program...But i don't even know if this is the right choice for me. I am so confused. Can someone please give me some education/career advice!
Thank you very much, any advice would be greatly appreciated since i am literally losing sleep over my dilemna.