Tiny White X Bottom Of Screen? :/

[OUAT]

There is what seems to be a small white x in a circle at the bottom of the screen that wasn't there yesterday, i have not done anything differently, i even uninstalled one app I installed recently the white x is right dead in the center. I have to restart the phone and it's gone however it just comes back seconds later, I really don't wanna do a factory reset again but idk what to do now no matter if I'm using the keyboard or playing games it's there in the way