everytime i hit the brakes it shakes really bad, and my abs light is on, i changed the pads, but i want to make sure befre i change the rotors.

94 4 door accord ex, vtec.

rotors all the way around, no drums.

 

Sounds like classic warped rotors to me.
To test the rears: pull up on the hand brake (gently) and don't use your foot brake at all while you are moving.
Better have them resurfaced or replace with new before the warped rotors cause those pads to wear unevenly. Then you might warp the new rotors with the uneven pads.