The lump has not gone away. So it is time to see the doctor after all. All the bad "doctor" jokes I've ever heard suddenly come to mind.
"Doctor, I keep getting the feeling that I'm invisible." "Who said that?"
"Doctor, I feel so unimportant." "Hang on while I attend to this phone call."
"Doctor, I feel like a zipper." "Pull yourself together and let's talk about it."
"Doctor, there's a lump on my knee." "..."