Shakey/Sticky collisions on right movement

Hey thanks for reading!

I am having trouble with a movement script I wrote for a very simple game I am making (just to test out Unity).

THe game consists of a movable rigidbody (which I will refer to as the player) and a bunch of normal blocks with simple Physics materials.

Basically movement works like this

if(right button is down){transform.x += .03}

I know this is pseudo code but I am trying to give you an idea without swamping you with code.

The problem is, when I move the character block to either the left or right, and it collides with a block, if I hold down either left or right the player sticks to the block and shakes back and forth.

I assume this problem is because Unity is registering a collision, pushing back the player, but since the person is still holding down the right button, they move forward again, which causes Unity to register a collision and on and on and on.

I am unsure how to fix this. And I might be wrong in my assumption.

Any help that you could give would be EXTREMELY beneficial!!!

Thank you so MUCH!

EDIT: Okay here is the code:

var time = 0; var lastTrig = 0;

 //Body cannot rotate 
 rigidbody.freezeRotation = true;

 transform.position.z = 0;

 //Moves the player left
 if(Input.GetKey("left")){
     transform.position.x += -.02;
 }

 //Moves the player right
 if(Input.GetKey("right")){
     transform.position.x += .02;
 }
 //The player jumps
 if(Input.GetKey("space") && lastTrig != 3){
     rigidbody.velocity.y = 15;
     time++;
     lastTrig = 3;
 }
 //Debug.Log(time);

 //Collision with rigidbody (Player)
 function OnCollisionEnter(collision : Collision){
 if(rigidbody.velocity.y <= .2){
     lastTrig = 0;
 }

}