Also note certain foods can make pee smell bad (asparagus and coffee, for example), so if it's not smelling bad tomorrow, it could be a food culprit. If you have discharge that smells fishy or is different than normal in addition, however, I would be suspicious of an infection.
It can be, do you have any other symptoms? Pain, pressure, swelling, itching or burning? It could be yeast or some other infection. If you have other symptoms beside the smell make an appointment and get it checked out before it gets worse. If it is just smelly drink Lots of water and flush your system.