Clear or uncolored urine is a good thing; it means you're drinking plenty of water. However, if you meant there is a white, milky discharge in your urine, you may have a more serious problem and should see a doctor. So: Clear urine = nothing to worry about; white, milky urine = worry.
Your about to start your period ,It depends if you are talking cloudy white then your bladder is sloughing off skin cells because you have a bladder infection. Drink lots and lots of water and cranberry juice if that doesn't help with in a couple days see your dr. If you mean it's so lightly yellow as to appear clear then it just means you drink a lot of fluids and the urine concentratin is watered down which is good.