Hello from late diagnosed - high functioning but struggling

Hi all, 

I was late diagnosed (age 40) ADHD 15 months ago and have just received an Autism diagnosis. I think I knew it already. 

Sadly, I got my Autism diagnosis while a MH inpatient. The past 7 months, due to a lot of life pressures at once, I've experienced meltdowns as never before, which have escalated into self harm and breaking things. I suspect my hormones have also started to change. 

I feel like I'll never get back into my normal life again. 

I've gone from being a uni lecturer and having my own business to currently being signed off work and starting to claim benefits. It makes me wonder if there's a route out. 

It feels scary knowing that overwhelm can tip me over into behaviours that a year ago would have felt completely alien to me.

I'm trying to learn about tools that help me calm and to pace myself more. It's tricky though, as I have a whole adult life set up that I need to be with. 

Has anyone else been in this kind of situation? 

Thanks so much