Weird smell?

Last wensday I had sex without a condom (for the first time) but we made sure he didn't cum. And then that Sunday I got a really bad cold and I am still sick at the moment. Two days ago I noticed a weird smell from my vaginal area.. There is no burning or anything, everything seems normal but the smell. What could it be and how to I stop it? I'm gonna try drinking cranberry juice in case it's a yeast infection. Please help!!