If i've learned anything from being an anxiety case and a hypochondriac on top of it, it's that the body is lumpy and lopsided.
If you find a lump, but six other people don't see/feel it, I wouldn't worry. It probably just means you're making too much of a normal tissue texture. If you really become worried, or the lump grows or causes pain, go to the doctor. Only they can tell you for absolute sure.