2002 Chevy Impala grinding at low speeds, helicopter sound

To be more specific, it seems like my fron t wheel bearing is going bad, but this grinding noise has become pretty random- mostly when brakes are applied or making slight turns, or unlevel surfaces. Though, if I set the car up for a week and start to drive again it doesnt act up for a few days. Also, the ABS light has started coming on sometimes. At speeds above 50, it sounds like a muffled helicopter. I've read where people with this problem have sepnt hundreds on bearings and breaks, only to find it was something in the circuitry instead. Dont want to be one of them.