I'm a broken mom

Yesterday I made a post about how my ex husband called me to tell me our 17 year old son got raped but a friend... The shock I was in.... I always spent my time preparing my daughter and teaching her to protect myself and never imagined my son in this situation. He had a rape kit done on him and my ex husband said the man said he honestly didn't even need a rape kit. He took one look and could tell. My son got some stitches. My boyfriend wouldn't let me use his car to drive to see my son because he doesn't want me staying with my ex. The car is in my name and I pay for it but he drives it. He hid my keys so I ubered. I saw him and gave him a hug.... I feel so heart broken seeing him so defeated... I slept in his room with him. I know someone's gonna say it's inappropriate but IDC. He told me his friend Thomas held his head in a full tub as he did it.... That he serious thought he was gonna die. Thomas has left. The police came to his house and him and a lot of his stuff was gone. Today was probably the worst Thanksgiving ever. My 15 year old daughter doesn't seem to understand what happened and my son was really miserable. He wouldn't eat. I tried to get him to but he says he can't because it will hurt because he hasn't gone to the bathroom. I asked why and he says it hurts. I heard him trying to go last night and he was crying in pain. So he's refusing to eat or poop. It's just been miserable. My boyfriend kicked me out for leaving so I'm gonna have my friend bring me my stuff and my ex is letting me stay in his office. Guys I really don't know what to do. I'm so heart broken. We are looking for a therapist, but in the mean time he just wants to stay locked away in his room. I thought about sleeping in his room again tonight and I know it may seem weird but I just want to be there for him.