My husband has anxiety and is on the spectrum, and like 10 min ago he just walked out and texted me 

"I don't feel well have lunch without me I don't wanna talk about it now nor when I come back"

I don't know when he'll be back and he has panic attacks sometimes and I'm worried 
He said he doesn't want to talk about it but most of the panic attacks he has come from him thinking he's alone and he needs to do things by himself and feeling overwhelmed with responsability but if he doesn't talk to me how can I help??? 

We have gotten him out of panic attacked by talking a few times where he'd just ask things like "you don't hate me right?" "Ita gonna be fine right?" And I just stand by him and give him reassurance that yes, I love him and he will be okay and we can work out Solutions to things 

I... I just don't know what to do? :(

Edit: he's back and I'm just pretending like nothing ever happened... Is this the best way?? I'm at a loss... I don't feel like this helps at all!

Edit 2: it ends up he was calling doctors offices and didn't want to be heard talking on the phone. I'm glad he's reaching out. I still wish I could do something to help him as well....