Son recently diagnosed with ASD and failed 1st year uni.

Hi first time on one of these forums but like everyone looking for advice and how best to give support.    My 19 year old son has recently been diagnosed with ASD.  He has had  emotional meltdowns for years but only at home, it has been difficult for us all at times.  As a divorced/single Mum I have tried to manage I suppose the situation,doing all the things I’m can do to help my son, endless reading and strategies.  Meltdowns have frequently happened, at times this has resulted in me being physically hurt.   In school he was a very well behaved, very quiet student.  He did get GCSEs and Alevels not high grades but he got them.  He got a place in uni not his chosen offered uni as he  did not get the grades needed but got  a place through clearing.  He went, this is what he wanted to do.  He was in a shared flat but this didn’t work out, he isolated himself saying everyone ignored him. I think he stayed in room all the time only going to get something to eat when everyone had gone out.   He struggled but still carried on, he wasn’t diagnosed at this time.  I tried to get help from uni but unless he went to them himself they would not do anything.  When he came back at Christmas we arranged for him to go back to a single flat.  That was better at least he was eating and cooking for himself.  He struggled to make friends, mainly staying in flat, he would come back more at weekends. University was what he wanted to do. 

He was still determined to try and apply for second year at the university he first hoped  for (obsessively  -everything would be better there)  I believed he was completing course ok.  He clearly was not happy where he was.
 He then had an assessment in April and was diagnosed with ASD, he had been on waiting list for 2 years.  

 He is home for the Summer has had his results for the first year and has failed all the modules apart from one where he just barely passed. So this is the end of his place at university. 

He  still believes he can go to his hoped for uni.  This will not happen, I  am unable to discuss anything with him as he is going emotionally from 0-100. It is all everyone else’s fault, the school, me, his brother.  
He needs to speak to someone a psychologist, get help for his emotions, there is only me  and the situation could get out of hand.  I don’t know where to get help.  The ASD assessment only offered diagnosis some advice on autism but not  therapy.  

I am struggling personally as I am exhausted mentally by it now.  I had a full on anxiety shaking attack the other day, something I haven’t had since my divorce years ago. I’m worried I haven’t got the strength I had to give the support my son. . I  can’t keep walking on egg shells, worried about triggers and his emotions getting out of control and the consequences of that.
I tried to get help for son over the years but  told everything is fine. 
I have looked through the bacp list and there are so many therapists.  I just don’t know where to go really.  I have been told It is better to get a therapist who has ASD.   We are in south Wales, Gloucester, Bristol area.  
He needs also to meet people  as he has no friends.  I’m thinking walking groups, I know this helps immensely and I go  on big hikes as much as possible with him but he needs others to do it with not his Mum all the time. 

My son is a fantastic, lovely young man and we all as a family just want to help him.