How old is you child now? My son also started his difficult behavior around age 13..14.. He started his drug usage around that time.. Coupled with puberty I think that is a bad combination.
The yelling screaming etc... All too familiar. My son was diagnosed as bi polar. I think also other things have played into his behavior. Loss of a close friend to suicide around age 16..
Lack of respect for authority was also huge in my son's case
We tried over the years to get him mental help.. Unfortunately the mental health assistance is lacking greatly in this country. He is now an adult and in jail... Not saying your son will follow the same route... But I do suggest getting him help sooner than later. I wish I would've pushed harder for that before it was too late and now he us lost to the court system.