I've Always Had Yellow Urine (typical Toxins Discharge / Healthy

i've always had yellow urine (typical toxins discharge / healthy liver & kidneys functions, i know that much), but for the last week or so, it's been as colorless & almost as transparent as water, and i've been instinctively drinking more liquids and urinating almost in urge every time & on the hour over the clock day & night... So unusual, it drives me crazy. What's the deal, is this one of the signs of possible kidney faillure? (i'm overweight: 270 lbs while i should be around 185 for my heigh & body constitution)