My Enemy Damage Script not working

I've read many tutorials and tried different things but it's not quite working out for me. My enemy has a rigidbody and a box collider, my bullet prefab also has a rigidbody and the circle collider is set on trigger. Not to mention my bullets go right through my enemy =/

 using UnityEngine;
 using System.Collections;
 
 public class EnemyHealth : MonoBehaviour {
 
     public float health = 10f;
     public float damageAmount = 10f;
 
     Animator anim;
 
     // Use this for initialization
     void Awake () {
     
         anim = GetComponent <Animator> ();
 
     }
     
     // Update is called once per frame
     void OnCollisionEnter2D (Collision2D col) {
     
         if (col.gameObject.tag == "Bullet") {
             TakeDamage (col.transform);
         } else {
             // Find all of the colliders on the gameobject and set them all to be triggers.
             Collider2D[] cols = GetComponents<Collider2D> ();
             foreach (Collider2D c in cols) {
                 c.isTrigger = true;
             }
             {
                 anim.SetTrigger ("EnemyDeath");
             }
         }
 
     }
 
     void TakeDamage (Transform Enemy)
     {
         health -= damageAmount;
     }
 }