I have to ask what your water pressure is. This is only because I have come across customers who think that their pressure is low compared to a previous home or a friend/relatives home and it turns out that everybody's pressure was high. It could also be a matter of volume, not pressure, depending on what your situation is. Your house pressure should be 45-65 psi depending on house and piping design. Lower than 45 psi may give poor performance and over 75 psi could cause damage to a variety of things on your plumbing system.
If you are on city water, do you have a regulator? If so, it could be bad or just needs to be adjusted.