So I went to get some food and when i came back i died so i just went to my regenerator thing and when i went to get my stuff at the place i died it had about 1,000 graves in a chunk so i lost all my stuff due to a glitch.
One of the graves contains your stuff. That grave glitch often happen when you die on microblocks/slabs etc.
As LordEreh has stated it is a bug between the interaction of the grave making plugin, and microblocks especially since it struggles to find a place to put your grave more or less. If your items aren't on one of your many graves I'm afraid we cannot do anything about it due to our no refunds policy. In the future I'd suggest logging off if you are walking away from Crash Landing due to harsh temperature and water requirements claiming the lives of so many afk players.