Julie, glad you are reaching out with your situation. It sounds like this shift to college has been pretty tough on you. Not to fear – many people have difficulty adjusting to a new lifestyle. Think about all that starting college means – drifting away from friendships you may have held since early childhood, being in a new environment where the “norm” might be partying, drinking to excess, and other life choices that you might not be interested in. It is stressful for most, even if they do fit into the lifestyle.
I would suggest that you try as hard as you can to avoid catastrophizing – a month is a short time to work with. Everyone I knew at college, from the stereotypical “jocks” to the punk kids or reclusive artist-types (of which I was one) ended up making friends. Like you, I was an introvert, and most of my friends were my roommates – that’s completely ok. I discovered my love of songwriting and poetry in college, which required a lot of alone time. My roommates partied without me when they felt like getting crazy, and with me when we were having more laid back social gatherings. It was uncomfortable to uproot my life and develop a new identity as an adult, but I made it, and look back on those times as some of the best of my life (I’m 31 now). Also, getting used to uncertainty and change benefitted me in the long run, as I went to grad school and moved about 5 different times after that.

If I were you, I’d take a step back and let things happen for awhile instead of putting so much pressure on yourself to “fit in” immediately. Think about what hobbies or school subjects interest you, and look for groups on campus that involve those things to meet people like you. Slowly integrate yourself into the community as you feel comfortable. If you are pretty sure you want to take up nursing, spend your spare time volunteering at a clinic or hospital where you can be in contact with people in your intended profession, and see if it’s really what you want. Also, take courses that would easily transfer to a nursing school (intro bio and chem probably, some psychology, etc) so if you make the switch, you will be a step ahead and won’t feel as much like your dad worked for nothing. College is an opportunity for personal growth, and unfortunately growth isn’t always as fun and painless as people think. Give yourself a full year to adjust, and if you still hate it after that, there’s no shame in transferring. I know many people who bounced around a bit in college and are successful today. Best wishes and keep your head up! You will get through it!