What a coincidence, as I had a migrane about 4 hours ago. I am also an only child who was not 'spoiled'.
Anyhow, don't allow anyone to get you down. I am personally glad that I no longer live under my parents' roof, but I can remember the days when they argued bitterly due to money problems, drug abuse, alcoholism, and other issues that their only child should have never been exposed to. Their problems can act as a powerful obstructionist to your dreams of becoming a nurse (if you allow it to).
However, keep the focus on your goals and dreams. Meditate that you are laying on golden sands in front of a peaceful Carribean beach. Block the negativity out. Do whatever you've gotta do to achieve your goals and make them a reality. Moreover, be advised that this website is full of people who care about your ultimate outcome.
Here's a kiss. I hope you feel better!