My little son got Raped?? Help!!?

I have a beautiful son who is 5 years old, and he was sleeping in his room. Yesterday, there was a male criminal who raped my baby boy in the middle of the night! My husband and I were shocked and my son is still confused and traumatized about the whole event especially since he is just 5. He has not even spoken since the event. The criminal left before we could track him down, but my son's testicles look damaged now and his face looks swollen....what doctor should I take him to and how do I make him feel better and resolve this entire mess? Very shocked, I never imagined this would happen!.....Please HELP!