How to delete image from server, accidentally added one during creation of a post

I was trying to copy/paste some things into the body section while making a post. I accidentally pasted a screenshot and it seems to have loaded it onto the server, made a link and everything. I don't want to add to server overload by having a dead, unused image on here. Is there a way to find that image from my profile or something and remove it? It isn't even part of my actual post and honestly seems like a great way to quickly mess up server storage if someone had malicious intent.