I had this same thing happen to me. It's very likely you chipped it. It happened to me 5 years ago, and I never went to have it looked at. Every once in a while ill bump my elbow on something and it hurts so bad that it will almost make me pee a little. I heard that they will dissolve after a long time, but mine has not in 5 years. There must be an actual chip or bone fragment in there, because I can feel it. If I were you, I would see a doctor, if it is in there have it removed, its unbearable to deal with it. You don't realize how much you place your elbow on stuff until you chip it. Sorry if I have frightened you...but its better you have it examined and xrayed
I can see with my X-ray eyes that there might be a [possible chip. To confirm that, you should go see a doctor.
you'll get a far more reliable answer from a hospital than you will from the rag tag caravan of strangers on here