MINECRAFT. How do i get home from the nether?

Either use cheats to bring you back to XYZ coordinates of your house, or leave the portal in place in the Nether and return to it so you don't end up in a weird place. If you move the portal in the Nether, you move the exit in the vanilla world.

Because you destroyed it so basically you made a new portal and to find your base just run around the map till you find it

Make a compass, this will point the way back to your bed. I like to build towering fire beacons along the way so I can see which way I'm headed incase I end up in the same place.

You will need to note the location of the portal within the Nether realm (or in the Material world, divided by 8) so you can rebuild it (which is a very perplexing action, as it wastes the durability of your diamond pickaxe as well as your flint & steel… So much players just leave portals active with some protective measures in place) near the place it was originally created (if not the exact spot).

Please be aware that travel is compressed in the nether realm by a factor of 8… So traveling 100m in the Nether realm will result in traveling 800m in the Material realm. This makes the knowledge of the desired portal CRITICAL as if the gap between your desired destination & actual portal is too great, it'll create a portal in the appropriate place in the Material realm.

It's just less of a headache just to keep your portal in place (& then build a protective boundary like a building around it, if you haven't already) since the connection is already there… You don't need to remake it every time.

You need to go back from whence you came.

You need to find the portal that allowed you to step into the Nether, from the side of the Nether.

If you can't find a portal, you'll need to find a way to make obsidian and go home, or you'll need to start over.