Hi WOO,
Sorry to hear things have become worse. If your son has been diagnosed with ADHD he may be offered medication which might help. When you next visit your GP to discuss this, perhaps you could ask for a referral for counselling a psychologist and/or social services.
There is another thread on here called Theresa, where there are lots of mums with similar stories who will offer emotional support and some may be able to also offer advice. Look it up and have a read through.
I know it’s not easy, but please do remember to look after yourself too.
Love Ivy x