Hi. In Gym One Of My Idiot Mates Threw A

Hi. In gym one of my idiot mates threw a 4kg ball at me. It hit my around my Pelvic area. I am now experiencing pain when I walk or lift my leg. It is only on my right side and I only feel it when I walk or lift my leg. What could it be. It's been 2 days so I'm scared that if it is test idle torsion I have lost the testicle already. Please help.