I am studying biology, food and nutrition and history at ALevel predicted 3 As. At GCSE I got 8As and 2A*s. I am considering Dietetics, physiotherapy, or Medicine if I took a gap year. What should I decide. In addition I would live to study in USA Id only go to princeton or darthmouth as they are need blind but don't think I have enough extracurriculars eg Librarian, scripture union, sports, volunteered at few youth events. What should I do ?