Should I Be Worried When My Penis Seems Smaller After Being Hit In The Groin By A Tennis Ball?

Hi sir... Iam 20 year old, yesterday i get hit by a tennis ball while playing a cricket.it hurted for 3 to 5 mins after that there is no pain. I walk comfortable there is no pain.But my penis size get little bit weak Please give me a clarification about that i het worried, please give clarification.Thank you..