Accidental teleportation with a nether portal

I was working on a project to make the 900 block transport easier, but I got teleported from 7220 in the overworld to 7220 in the nether, and that meant I was 50000 blocks away from my current base because the game got a lot of info from me placing a lot of cobblestone and forgetting to divide by 8 (note: no, it's not the ruined portal on screen