having it checked out by a doctor is best in this situation, i too at age 23 in College had a similar scare with a strange lump, but doctor did a physical exam, and full bloodwork, turned out to be nothing, and eventually went away on its own. Try not to get yourself worked up, We often here about cancer, but that is the internets "worst case", try not to google your symptoms, 9 times out of 10, you will get worst case scenario. I can be a hypchondriac at times as well, and so sympathize with your need to feel comfort, but worrying about it, isn't going to make it any better, just worse, so be good to yourself, make sure to get rest, and dont worry about the "what ifs", you'll drive yourself nuts. The blookwork and physical exam are important to get. And try not to "self diagnose". Right now, to you, its a lump your having checked out, let the doctor ease your mind, not the internet doctors, haha.