Medicine is a great career, but in my opinion its not worth the stress that you're gonna have to endure for the next decade of your life. I'm an RN working in critical care at a large hospital. I have a lot of friends who are residents, many in the surgical subspecialities. When I was younger I thought I wanted to do medicine, I took the MCAT and all that jazz. Then I saw what my buddies gotta go thru in med school and residencies... definitely not worth it in my opinion.
If you want a cool job in health care where you'll get to do way cooler things than most MDs do consider being a CRNA. You'll get to intubate, line, do nerve blocks, epidurals, etc and basically get to sit around keeping your patient alive during a surgery. You're gonna need a B.S.N in nursing and a couple of years of ICU experience, then a 2-3 year masters in anesthesia. Avg. salary for CRNAs are in the 160-180 range, and you can make more if you wanna put the hours in an work in underserviced areas. You could be making close to 200k in your early 30s if you choose this career path. Furthermore there is a substantial demand for CRNAs as the general US population is basically fat and unhealthy. Just check out gaswork.com or this study:
http://www.aana.com/uploadedFiles/R...ournal_-_Public/2006/August_2006/p287-293.pdf
You can try moving out but it puts a lot more stress on yourself financially especially when you're trying to make it thru school. Trust me man, I moved out when I was 21, and had to resort to stripping during my schooling to put a roof over my head, buy food and afford tuition. Unless you're making a lucrative income while in school, its a lot easier to stay at home. Stay busy with school/work and the stressors from home really shouldn't bug you.
If you do decide to take nursing, then you'll be going to school w/ 90% young girls. Some of em will be hot and most of em will have hot young single friends... You'll graduate in 4 years and have a job that will instantly pay 25-30 an hour. Get into a big ICU preferably at a level II or level I trauma center, work there for 1-2 years and then apply to a CRNA program. You'll be done in 2-3 years and easily be making 6 figures working part time if you want. You'll be enjoying steady high demand employment with a good income and great working conditions in a market where everyone is losing jobs. Seems like a no brainer to me.