This isn't an old wives tale, get some cranberry juice or some cranberry capsules from the health food shop, it helps to stop the bacteria sticking to you're urethra. I would advise going to the doctor or well woman clinic, it might be something else, so you need to get checked out.
If you take the cranberry stuff, it can also help stop it happening again.
You might need antibiotics to get rid of the infection, as might your boyfriend, otherwise he'll just keep reinfecting you.
I'm not suggesting he's got anything but it would merit getting checked, some of the stuff without symptoms can have quite serious consequences
Get well soon