It's like a week since you went no contact if I gather correctly. That's still very early. In my case, for instance, I barely left my bed for the first 2 weeks. All the other stuff came a bit later. I don't really remember how much exactly. So yeah, unfortunately the answer is still just time.
I might have another suggestion as well. For me journaling was kinda helpful. My head was full of alternative scenarios, questions to ask and things to say to my ex. Since I couldn't do that, writing it down cleared my head a little bit. I guess don't do that if it will make you dwell on the breakup even more. But if that's all you think about anyway, then there's probably nothing to lose here.
Sending virtual hugs your way. Be strong!
This is exactly how I got diagnosed with autism.