Dealing with stress

I am on the verge of receiving my diagnosis for autism. I have been going through some stresses in life which have really brought out the effects of autism in me. I am increasingly finding my mood is shaping the sort of person I become. Given the current issues I have been fixing at home the problem is only exacerbated. 

This is impacting my home life and the relationship with my wife and child. I struggle to know how to cope and to essentially control those autistic parts of me. At the moment I am in a place where my mood and what I am doing is causing issues which only making the stress at home worse. 

If anyone has any advice that would be great as I feel myself feeling worse all the time