The steering is getting really hard to steer..

First pop ur hood
then look towards the back of the motor of your car
u will see a big cylinder shaped booster with a resivoir coming out of it.
this is your brake booster and master cylinder these fluid levels mean nothing as far as your problem is concerned.
keep looking and you will find another small resivoir with a cap on it.
this is your power steering fluid.
take the cap off and check to see how full it is.
you most likely have a leak in either a power steering line or your power steering pump is faulty and leaking. this will cause hard steering if youre fluid levels are insufficient.
hope this helps you with your problem.

Brian