There is no ends portal in my world

After following the steps about how to find the ends portal i found out there is a mistake in my world, i use the ends perls to finde the location, then when I throw them and they went through the ground I dug dug hoping to find the portal and it didn't, I even dug a whole perimeter to make sure I didn't miss the cave because of some diffrence blocks and even then the cave isn't even where it should be the portal nor the portal.