Serious performance issues

So I am making a game where I have a player that moves on the X axis, and catches objects that fall on him to earn points. Here is the script I use to spawn the objects:

 using UnityEngine;
 using System.Collections;
 
 public class Spawner : MonoBehaviour
 {
     private GameObject[] locationsToSpawn;
     private float counter = 0;
     [SerializeField]
     string[] listOfPossibleTags;
     [SerializeField]
     GameObject[] objectToSpawn;
     [SerializeField]
     float timeBetweenSpawns = 3.0f;
 
     void Start()
     {
         locationsToSpawn = GameObject.FindGameObjectsWithTag("SpawnLocation");
     }
     void Update()
     {
         counter += Time.deltaTime;
         if (counter > timeBetweenSpawns)
         {
             GameObject spawnedObject;
             spawnedObject = Instantiate(objectToSpawn[Random.Range(0, objectToSpawn.Length)], locationsToSpawn[Random.Range(0, locationsToSpawn.Length)].transform.position, Quaternion.identity) as GameObject;
             spawnedObject.gameObject.tag = listOfPossibleTags[Random.Range(0, listOfPossibleTags.Length)];
             counter = 0;
         }
     }
 }

So with the code above, the objects are spawned above the player and begin falling on him. The player moves and picks up the falling objects to earn points. Here is my script that counts the points:

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 
 public class POINTS : MonoBehaviour
 {
 
     public Text countText;
     public Text winText;
 
 
     private Rigidbody rb;
     private int count;
 
     void Start()
     {
         rb = GetComponent<Rigidbody>();
         count = 0;
         SetCountText();
         winText.text = "";
     }
 
 void OnTriggerEnter(Collider other)
     {
         if (other.gameObject.CompareTag("Pickup"))
         {
             other.gameObject.SetActive(false);
             count = count + 100;
         }
             SetCountText();
             if (other.gameObject.CompareTag("TestSolid"))
             {
                 other.gameObject.SetActive(false);
                 count = count - 300;
                 SetCountText();
             
             }
     }
 
     void SetCountText()
     {
         countText.text = "Score: " + count.ToString();
         if (count >= 1200)
         {
             winText.text = "Congrats! To play again press <";
         }
     }
 }

Looks good in my opinion. Only problem is, after the player picks up a few objects, the score starts sky rocketing. So I have it set up so every object is +100 points, but after picking up a few objects the score starts adding a lot more points than +100, so after picking up 5 objects I'm already at 1,500 points!!! And once the score skyrockets past 23,000 points (about 10-15 objects), then the game starts lagging and eventually crashes Unity. What is wrong with my game? I don't see why I'm having such performance issues and why my point counter isn't working right.