Managing my Autistic Son

I am a single parent and my son is 19 years old with Autism. At the moment due to a lot of changes in our lives my son is showing very challenging behaviour and i am on my own to dealing with this. Are there any parents in the similar situation who might have experience and advice for this situation? I dont have many people to talk to about this and i feel helpless at times. I love my son and am trying to be the best i can to support him but he can become very hyper active due to his anger so am not sure how to deal with it. Thanks everyone.