J.T.
Good Morning S.:
Please let me preface what I am about to say with letting you know my credentials. I am a Certified Physician Assistant & Midwife both in PA & AK.
Does your son have a Psych diagnosis? If he does has the therapist offered Mobile Therapy to you as a way for you to have some respite care?
This would give you the break you need and allow your Son to have sometime that he gets REAL one on one with someone other than Mom.
If he doesn't it might be time to seek the aid of a Psychiatrist instead of just a therapist.
When what you are doing is not working it is time to have a look at some other options.
Something/Someone has pulled this behavior out of your son. Have a look, if need be by back journaling (basically going back over his little life and seeing where there were changes). If you can pinpoint when this behavior started, you can often stop it.
I wish you the best of luck and will keep you in my prayers. Please if he has not already seen one, get him into a good Child Psychiatrist.
God Bless,
J. T