actually, its supposed to be bumpy. you now have a stiffer suspension, which translates to improved cornering capability and less body roll in hard turns. its always a compromise between better handling and a smoother ride. but still...upgrade your shocks because the stock shocks werent meant to take the increased heat from a stiffer suspension. they will wear quickly, if they havent already. its probably just your coilovers though because that is normal for a coilover suspension (having a bumpy/firm ride).
to look at it another way...you basically brought your suspension a little closer to a race car's setup.