funky - At least you know you're not alone, and there will be others in our shoes too. I always find that it is far easier to remember the negatives from an interview as opposed to remembering the positives, therefore all you can do is try and focus on what went well and approach tomorrow's email with a positive outlook - regardless of the outcome. If we are unsuccessful, then the FPP obviously wasn't our route, but that doesn't mean we won't approach BA in the future.
@claudiaupear - I'm definitely not jealous of your situation due to the time difference, but you have obviously approached the interview in an enthusiastic and committed mindset so I wish you all the best.