Still sounds like the wheel bearings to me! I rotated tires once and it improved a little, after swapping the bearing it went away.

 

Hey. Well, to whomever is interested, the problem has been solved. I took it to 2 mechanics and one said it's not the bearing because then i'd hear a noise even while driving straight. The other mechanic said we should change the brakes since the rotors were old and rusty and my pads were wearing out (the inside ones). We changed the pads/rotors and he tried to repack the bearings but he said they were "black" so he just replaced them. The noise is now gone. So, I still feel it was s/t with the rotors/pads because pressing the brakes made the grinding sounds go away, but whatever it was, it's now gone.

Thanks to all who replied!!!