What type of psychological disorder could this be?

the person I am describing is sometimes distracted, you have to repeat things. He is very preoccupied with doing the right thing and very preoccupied about taking care of his little brother, he is serious and seems to be always thinking. He sometimes says things that are a little weird. Headaches and gets stressed easily, i notice when he is acting weird his pupils get really big. He sometimes lacks emotions, he is a bit social withdrawn, he had very few delusions at the beginning not anymore. He was not like this before, he had like a psychotic attack at once thinking he was going to hell and thinking doctors wanted to kill him when they just wanted to draw blood, since that episode he has been very calm and quiet, no outburst or angry and sometimes saying weird things like he has to help his family but in a really serious way.