xbox one bedrock addition world just gone

Was playing my main survival world for 5 hours last night and when I come to load up minecraft today theres nothing. the world aint greyed out, it hasnt got a crazy amount of data, its not unresponsive its just not there. gone. the other worlds are all there, but that one just has no icon or anything. As if I had never made it at all.

any in-site would be appreciated