Thanks for the query.
The possible causes for your problem are :
- Sometimes altered colored urine can be seen in pregnancy
Usually in case of preeclamsia, there will be passage of albumin
in the urine, that can lead to whitish appearance of urine.
-Contamination of the sample.
due to other causes like lymphatic problems, parasitic infestation etc.
For more details :http://srsree.blogspot.in/2012/04/chyluria-introduction-etiology.html
- Sometimes vaginal discharge
can be interpreted as white colored urine.
So, consult gynecologist once and get examined.
Go for investigations like urine microscopy, serum proteins
, blood pressure estimation etc .
Possibly with this workup the cause for your problem can be identified and treated.