2002 Nissan Sentra Noise Advice

I have a 2002 Nissan Sentra. Lately I have a deep grinding sound when I first start the car and drive at a low speed. If I am moving forward at a low speed (5-10 mph), remove my foot from the accelerator, and put my foot on the brake, the sound stops. What I mean is the sound stops when I put my foot on the brake and restarts when I accelerate slowly. If I really accelerate (15-20 mph) the sound stops. It was damp and rainy yesterday and I felt it was worse. It usually disappears with driving. I had the brakes replaced about 5 months ago, and the problem begun within the past few weeks. Thank You!!!

check the dust shields behind the front rotors.