Whatever you decide to do, DO NOT do nursing! It is absolute hell for an introvert. I am currently in the final year of my degree in nursing and I am already feeling burnt out. During my clinicals I have to work at an extremely FAST FAST GO GO GO pace with non-stop constant overstimulation and interaction. I do not have time to switch off and breathe, even during so-called breaks. When I get home I am drained of energy and feel depressed. It is taking its toil on my health. I am now on anti-depressants because of it and have started smoking. Please, if you value your health, NEVER consider this career option if you are an introvert!