Procedural generation issue

I have a script that randomly generates rooms as you go. When you enter a new room, a new one spawns ahead of it. however, there are rooms that can spawn others to the left and right, and if you get enough of these in a row it overlaps with already generated rooms. How do i fix this?

code that detects when you enter a new room:

Code (CSharp):

1. private void OnTriggerEnter(Collider col){
2.         if (col.gameObject.tag == "RoomTrigger"){
3.             Room room = col.gameObject.GetComponentInParent<Room>();
4.             Destroy(col.gameObject);
5.             Debug.Log("Trigger");
6.             GenerationManager.Instance.EnterRoom(room);
7.         }
8.     }

code that spawns rooms at all spawnpoints for the next room:

Code (CSharp):

1. public void EnterRoom(Room newRoom){
2.         currentRoom = newRoom.GetComponent<Room>();
3.         roomNumber++;
4.         for (int i = 0; i < currentRoom.nextRoomPoints.Length; i++){
5.             Instantiate(rooms[Random.Range(0, rooms.Length)], currentRoom.nextRoomPoints[i].position, currentRoom.nextRoomPoints[i].rotation);
6.         }
7.      
8.     }

I was thinking that i could maybe try to check if a nextRoomPoint(a point where a new room can be created) is inside another room but I dont how to do that

thoughts?