teen angst or something else?

hi there, I'm new here and needing some advice please?

My son was diagnosed ASD last year just before he turned thirteen, he's recently had his 14th birthday.

I get the current situation with the virus will not be helping anyone's situation but I'm noticing a quite large decline in my son.

Hes a teenager which may contribute to his behaviour, but he is becoming more and more verbally aggressive, to the point I feel he is abusive. This is to all of us in the household. He also is manipulative, which is making me wonder if this is PDA. Ive read though that people with PDA are imaginative and my son has an undeveloped imagination, he is very compartmentalised in his thinking, everything has its box and nothing is outside of them. His sleeping pattern is erratic, weve attempted to get him into a routine but its almost like he cant cope that we are dictating the time. He likes to be in control and cant understand another persons view easily. It worries me quite a lot how his behaviour is evolving, he seems to have lost vital skills hes learned, since not being at school and having that support in place. 

We don't know much about ASD besides what we've read, we've not really received much support since his diagnosis due to waiting lists and now the virus. We dont know if this is to be expected at his age or if we need to get some intervention. 

We do think theres a possibility he has adhd aswell, my husband was diagnosed as an adiult and they share traits, but camhs asked us to give our son a year to get used to his diagnosis before looking at more assessments. We can only see another waiting list and zilch support in the meantime from camhs. 

Any advice would be appreciated! Thanks