La chica enferma: diviertese?

I´m sick in Spain. I love the country and I love speaking Spanish here but I just want to sleep and get better. I wonder if it would be possible to delay my trip, to continue it later. I´m just not having that much fun, being too tired to go out all the time. I know that I should go to Granada because we just bought tickets; maybe there are flights available from Barcelona back to the states. We´ll see.