Elbow trauma

I was knocked down during a match onto concrete floor and hit my elbow very hard(my students heard it from across the tournament site). It hurt but didn’t slow me down at the time. That was a full 3 weeks ago, and still it seems as though I have a pea in my elbow that is very painful when pressure is applied to it. Should I take the time to make an appointment with the doctor, or will it just go away on it’s own. Any help would be appreciated. Thanks!