What Would You Do?

I just remembered I need your guys help. It's been an eventful few days. I kicked my husband out for threatening my 15 year old son and an issue happened when he got home from school. My son ran up to his room crying. I asked what was wrong and he just told me to go away. I tried asking my 12 year old what happened and she said he was crying on the bus. She doesn't know. At first I thought he had an accident at school(medical condition) but he had on his same pants from this morning. He's locked himself in his room all day. I was planning on calling the school to see if they know what happened. Should I call the school or wait for him to talk to me. I keep trying to talk to him, but he just tells me to go away. This past week has sucked so much. It makes me sad my kid won't even talk to me.