Sorry to hear you didn't like teaching. Do some more research before you decide to go with nursing. I really believe that nursing is a career you must WANT to do, not for the money, not for the job security, not for the flexibility, but because you WANT to be a nurse. Even then, it can be a difficlt and demanding job. Much more so than I thought. I have always wanted to be a nurse, was so thrilled when I graduated 6 months ago, and in the last 6 months have been frustrated, stressed-out, disappointed, and overwhelmed. The thing that keeps me going is that I know that I am helping my patients.
Nursing is a demanding job, physically and mentally. The shifts are long, the mental strain is difficult, the time factor (never enough of it) is hard, dealing with demanding patients, worried families and arrogant doctors is frustrating, and to top it all off, you have to work weekends and holidays.
There are great aspects of nursing too. There is no better feeling in the world than knowing you made a difference in someone's life, even if only for a little while. Being your patient's advocate, teaching your patient how to care for themself, or just being there to listen to your patient and knowing that you helped is extremely rewarding.
If you know anyone who is a nurse or a nurse's aide, ask them about it. Go to your local community college and speak with the director of the nursing program, ask questions and see if maybe you can "shadow" a nurse for a shift at your local hospital. I know the hospital I work at allows that.
Good luck in whatever you decide. Sorry if I sound negative, I don't mean to. Maybe I am just still really new at this and still feeling overwhelmed.