I am sorry you were ill but glad you had support from your mom and sister. Just knowing you didn't have to worry was probably key in your recovery as well.
As for injuries from school? There wasn't any physical stuff, but more along the lines of bullying. My youngest son was just in high school, freshmen year, and never said anything for a few years before saying anything about it. During that time, he didn't seem like anything was amiss, but he bottled it up inside and was very good at acting like all was well.
I hope nothing either physical or emotionally occurs with your son. Take care and have a lovely day!