Trouble with Co routines & WaitForSeconds

So mega newbie here, first time posting here. Making a small 2d game and want to have a coroutine to trigger a powerup on and off again after the coroutine. Now I don't have a problem calling the coroutine but the problem is that it seems to not run any of the subsequent lines after the WaitForSeconds. I've tried WaitForSecondsRealtime and did not work either. I have used this code before in a tutorial, but for some reason it won't work here. Once again, the lines of code within the IEnumerator are not running, I believe something might be conflicting or halting the time but I'm not sure what it could be. Here is my code:

 void OnTriggerEnter2D ( Collider2D collision )
 {
     if( collision.name == "Woman" )
     {
         Debug.Log("player has absorbed the crystal");
         Destroy(gameObject);
         StartCoroutine("PowerUpTimer");
 
         //set value for the powerup
         // set some alert to notify that woman has the powerup
         //set the special bar to fill and react to the use
     }
 }
 
 IEnumerator PowerUpTimer ()
 {
     Debug.Log("woman has special");
     womanCombatScript.hasSpecial = true;
     yield return new WaitForSecondsRealtime(2);
     
     Time.timeScale = 0;
     Debug.Log("the waitforsecondswentthrough");
     womanCombatScript.hasSpecial = false;
     Debug.Log("woman no longer has special");
 }