Random Letters Appearing Everytime I Do Anything

Someone please help me. I was doing fine on my Photoshop and then googled up how to arc the text - I followed the instructions, creating a path and then using the text tool to hover over it and start typing. I did this twice, however the second time, it all got ruined and I'm not sure why. The last two characters in the text I wrote, " 's ", was scattered all over my project. In all my layers, and even in completely separate projects, the two characters were everywhere. I tried everything; went layer to layer and manually erased them all, but each time I finished and tried to move on with what I was doing, they would come up all over again. They won't stay gone.