function isnt working in the class

hi, i tried making a script and it was working initially when all i had the function do was to subtract health, which was working fine and now when i added all these if statements and stuff, nothing runs, not even the debug.log is unless if i delete everything else i wrote. no errors, either

 class Properties{
     var maxHealth:int = 100;
     var health:int = maxHealth;
 var dmgCD:float = 0;
 var canGetDmg = true;
     
     function Damage(amount:int){
             Debug.Log("hi");
         if(canGetDmg){
             health -= amount;
             canGetDmg = false;
         }
         while(dmgCD < 2){
             dmgCD += Time.deltaTime;
             yield WaitForEndOfFrame();
         }
         if(dmgCD >= 2){
             canGetDmg = true;
         }
     }
 }
 var p:Properties;
 function Start(){
    p.Damage(10);
 }