future,future.sigh.

Yesterday,I managed to go to the Karnival Jom Masuk U @Shah Alam.And I kept on asking myself a few questions like 'Do I am fully prepared for the university phase? How abt my SPM result?What courses should I pursue and sort of.There were many booths there,where most of them were from IPTA's.Most of the unversities that I've been visited told me that medical courses are very hard and tough.You must be fully prepared physically and mentally yadda yadda yadda.Now,I am really confused abt my future.What should i be? *sigh*