Was it your first brake application after changing the pads? You should have pumped the brakes before driving to push fluid back into the calipers and push the pads against the rotor before driving.
If you bled your brakes, then you might have air bubbles. Bleed again.
AW/Terra | ZSP | ZPP | ZCW | iDrive | CA
Mods: BC BR coilovers | Blacklines | M-tech rear | dual exhaust | M3 steering wheel | BMW SSK | ZHP shift knob | High-kick CF spoiler | NBT Retrofit
M3 front control arms | M3 rear guide rods | Manzo rear toe and camber links | Monroe rear shock mounts | Varrstoen ES1 19x9.5+20 Front, 19x11+25 rear