Aye, Dancing rodents to all of you!!! (Conga rats!

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There will always be another resit/career/ etc. Remember its not a race through life, take your time and choose what you really want. TBH I wish I'd taken a year out between college and Uni to have a break from the constant stream of education that you have been subjected to for the last 15 years or so.
Also don't feel so hung up about what you actually want to do for a living, some of the most interesting people I know still haven't a clue. I always feel that you are pushed into making choices with all this pressure about the rest of your life depending on it when to be brutally honest it doesn't. Soemtimes to fail makes you evaluate what you really want to do rather than what you think you should be doing. Life has a funny way of turning out better than you could have hoped for.