If it is not accompanied with itchind, burning or any foul smell then its normal. As clowe93 said it only gets worse.
Could be a BV (bacteria infection). Or it could be a yeast infection. Both are common. If you have a fishy smell then it's just more likely that it's a BV. They have creams for both. Make a appt with your doctor so they can treat it.
If it has a smell or different color than white, let your on know.
It gets only worse the farther you go.