Our son went through a very similar situation last year at age 17 in high school. He was hurt during football, had to forgo playing for the season, and became extremely depressed because of the pain, headaches, and eventually had surgery.

Long story short, he was so depressed from the pain, not being able to play, and missing so much schoolwork he could not return to school and we even tried the 1/2 day or independent study. The school pushed for having him return because they lose money if a student doesn't attend a school day.
My son even started to isolate himself from all his friends.

I became more concerned about my son, then he began making suicidal statements and that was the final straw.

I just let him unload and talk to me and I listened. I asked him if we could get him help after hours of talking. Finally he agreed.

This is the hardest thing you can go through. KEEP STRONG! Sometimes if there is both mom and dad talking to him he may feel smothered. Our son felt better just one on one - with the one parent he could best connect with. Just listen and smile and tell him how much you love him and it will be ok. Every situation and child is different.

Our son was placed on medication and therapy. After being pushy and rather demanding, we found the one teacher at his school that he trusted and he went to her when he felt he was having an episode or bad day once he returned to school. She has been wonderful. She, in fact, suggested he come to her when he needed a place to relax. The school district has programs to help your son. If a doctor writes a note stating so, a teacher can come to your home for in home school. (California). I believe this is available in most states. They don't advertise this but it is available and was given to us.

I am praying for you and your family. We have been close to what you are going through. It is a rough road but you will persevere.

It's been a year now for us and things are finally getting back on track. Now talking to our son with a clearer mind we realized it was the injury, the hormones, the pain, the loss of playing his favorite sport, the headaches, and the pressure of school work that overwhelmed him. We still have a fragile son, but we've learned our boundaries and as he.

You are an awesome parent. I am praying for you, your son, and your family