Mine ok...
Well, a guinea pig's urine is usually an opaque substance. It should be cloudy. If it is leaving white stains, then you may be feeding too much calcium and may get a bladder stone. You should try to rule out an abundance of any one type of food, giver her a variety.
In case your pig does have too much calcium in the diet, here are a few tips to reducing the calcium intake:
1. Guinea pigs over 12 months of age should be fed a timothy-based pellet diet (pigs under 12 months should be fed an alfalfa-based diet, because the additional calcium from the alfalfa is used for bone development). Oxbow's Cavy Cuisine or Kaytee's Timothy Complete are good timothy-based pelleted diets.
2. Guinea pigs over 12 months shouldn't be fed alfalfa hay (again, because of the calcium) however, it can be fed occassionally to a pig under 12 months. Timothy hay, or another type of grass hay (orchard grass) are better alternatives.
3. Be careful of veggies that are high in calcium (such as parsley); they should be fed in moderation only.
It would be good to take her to the vet just to make sure, because a guinea pig's health can decrease very quickly.
i have send 2 vet and the doc cant find whts wrong wit her since she still a baby