I Was Hiking, Slipped And Fell On Rock. My Elbow

I was hiking, slipped and fell on rock. My elbow broke the fall and initially was bleeding but eventually stopped. My elbow was sore initially for several days but the pain eventually went away. I had my shirt off today and my girlfriend noticed that it was considerably swollen. It does not hurt and it feels soft to the touch as if there was fluid on it. Is this something I need to seek immediate attention for? The accident happened five weeks ago.