Falling then Apply Damage.

I've made a simple falling then Apply Damage script. but when my character jump and then i pressed pause (time scale = 0) the time fixed delta time still increase and apply damage. but when i'm fixing the script and then i'm trying to jump and press pause, this script finally didn't apply damage when pause, but when i'm unpause the game apply damage become 1000+. Now my question is How to make this script not calculating fixed delta time when i'm pausing the game or it will apply damage when the player is grounded (my script apply damage when i'm not grounded).

thanks for reading and answering.

this is my script. iAmFallable is boolean. gotHit Timer = -1.0 fallingRate = 100 fallingTimer = 0 disableJump is boolean

 function Update(){
     //Debug.Log(fallingTimer);
     if(!controller.isGrounded && iAmFallable){
         fallingTimer += Time.fixedDeltaTime * fallingRate;
             if(fallingTimer > 80 && Time.time > gotHitTimer && !disableJump) ApplyDamage(fallingTimer / 10 + Random.Range(2,15));    
     }
     else if (controller.isGrounded)fallingTimer = 0;
     if(health < 0) health = 0;
 }