Desktop is broken on linux

[SpangB4b]

Alright so, I was playing around with php and stuff using local by flywheel and atom with firefox open obviously, I was using about 1.5 gb of ram while doing this stuff (I had some other stuff open), I decided to change my desktop background to something else I downloaded earlier, next thing you know, the desktop literally stops working and the settings for desktop aren't working, I can change anything in the settings except the desktop settings, I'm using lubuntu latest version, tried killing all processes and then restarting with init 1; init 3 but it didn't work. Sooooo, any ideas? (posted this in general discussions and didn't realize)