Bad Noise up front

Ughh I had to get towed home 60 miles thank god for AAA Plus!

so my problem is I was cruising down the road when i noticed a slight "burbble" comming from the engine bay But only when I was light throttle basically maintaing speed. the noise stopped if I accelerated or decelerated. After about 3 miles Burbble is now more like a grinding curchunk sound and started to get a slight vibration. So I stopped checked it out didn't see anything obvious from the side of the road. I tried going again but slower and it was Much worse NOW so as I was stopping again only went like 20 yards I noticed if I tap the brakes or accelerate is stopped making the Horrid sound. other than that the car ran fine accelerates good holding boost nothing else odd just was getting bad sounding quick

Any Ideas where to start?
and yes my Vag-com came fedx on friday (just gotta figure it out now)