I entered a nether portal with my luggage full of parts to make an ME System out and following me. I got what i had needed from inside the nether and came back out. After returning to the normal minecraft world my luggage was no where to be found and I can not get my items from inside of it. Any help would be appreciated.

If you think there's a bug you must provide version numbers.

But there's a possibility of your luggage spawning elsewhere in a new portal. You'd have to check (maybe with MCEdit?)

i was on version 1.12.2 and i cant use MCEdit as its not my server.