I lost all of my items from just entering the nether portal and coming back

Ok so I had just came back from a mining trip with lots of ores 3 stacks of iron,14 diamonds and 23 gold. Once getting to my house I put all my items totally my diamonds in with the ones I had already at 41 diamonds, 8 stacks of iron ingots and 6 stacks of redstone and 41 gold. After doing this I went to the nether to go blaze rod farmer. After coming back from the nether I went to my chest to create some new iron armor and a diamond pick to enchant. but what I came to was my chest and my entire chest storage area had been completely empty. I also had a chest of wool,food and stone. But I didn't care as much for that stuff sense that stuff is pretty easy to get but I was pretty annoyed seeing that all of my ores had just despawned for no reason! If you guys can get this bug fix asap I would really appreciate it. But I can say one thing i'm not going to the nether any time soon. Also I forgot to mention this was a a peer survival world. No cheats nothing...