Nether HUGE BUG

I went to nether AND it was TOTALY weird looking and what the hell happened. I just went to nether to loot and my portal disapeared and I don't have any obsidian and I just lost 2d played minecraft save... my portal was at 10, 71, 14 cordinates and is now gone.

I have world backed up but is oevr 10h behind of work so I am too scared do that if the nether thing happens again....

pls help me get my safe back Mojang