I can't save nor open my world.

So this was my last post:
"I think it started a week ago, but I just waited it out in hopes that it would fix itself. The problem is that when I click one of the upper buttons in Mcpe to save my world (this is not a server, by the way), nothing shows up. the save, options and those kinds of buttons don't show up. I'm forced to get out of Minecraft and quit it on my phone to play another world. On the side, it looks like the buttons were about to come, but stopped before it can get part of it on screen. I'm just scared that the autosave won't get the last bits out before I have to stop playing, and if it gets too laggy I'd have to redo (Minecraft)days of work."

But nowadays, when I try to log into that world, The screen is plain white, and the screen looks like the screen that appears when I'm sleeping in Mcpe. It's that screen with the open chat or get out of bed (I forgot the name) option. After a few seconds, it lags before I can get out of the bed, and the game shuts down and I have to open my Minecraft game again. I can't interact in any way with my world, and I really need help since I spent so much time and energy on it.



pleasehelp:((