If you have the coords for the overworld then divide those coords by eight and build your portal there but, if you have coords for the nether then just go there - sorry if this is too late.
I gave up n started a new map been posting stuff I have made
usually if you die in the nether you are screwed
Oh...well Thts a gg for me 😭
Items can't despawn if the chunk they're in isn't loaded so you should probably go too where you think you died wearing gold boots and iron armor.
It’s in a chest but I have no clue to travel around the nether I have the coordinates tho