Little glitch images appear on layers I draw on

On adobe photoshop cc 19.1.6 release there seems to be odd images glitches on my drawing layers. the weird thing is that I can get rid  of them with an eraser or brush by painting over it but the fact is when I click on a layer and paint over that obe, click another layer another image like glitch appears, a bar like glitch that appears and another one would appear again when I erase or paint over that. What is going on? I have a project due this week and it’s really important. The glitch images appear when I save it to a jpg too and that’s not good! This only seems to appear oddly enough on one file of mine on photoshop. M other projects don’t seem to have the same effect on it.

My MacBook Pro with macOs high seirra 2017