Hi rosalina. You are describing exactly how I felt after I found out I had lost my baby. I am very sorry that you are having to go through this.
For me, I felt having another scan privately (abandoned the orignal hospital in disgust!) helped me take some control of the situation. I wasn't able to book an ERPC straight away (had to book 2 more NHS scans first because I changed hospitals), but I was keen to put something in place ASAP to finalise things. In the end I had an ERPC as an emergency, before the second hospital scan could take place. I really felt that once I had the ERPC, I could move forward. I still felt awful, but wasn't waiting any more and any false final hopes had gone. I suppose that's what "closure" is. I just hated that out-of-control feeling of being at the mercy of my own body.
I am not surprised you can't think of anything else. I found out my pregnancy wasn't "viable" on 20th June, had the ERPC on 29th June, and it was all I thought about during that time. It still occupies a large portion of my thoughts each day, I would say it is always there in the background whatever I am doing - I never forget this has happened even for a moment. However, I am feeling a lot better, can enjoy things again much of the time, often laugh and smile now (which I just didn't think would be possible at one point), and don't cry very often anymore. I am still very tired, and feel a bit delicate physically (but I have CFS / ME and I think what has happened has caused the symptoms to flare up a bit), and have not resumed normal housework duties (so am sitting here ignoring the hoover and iron and the results of said ignoring mounting up in front of me...). I am not back to my pre-mc self, but feel I am making good progress. Now I am feeling ready to TTC again, but waiting for some indication from my cycle, so getting quite impatient...
I would say to just go with whatever you are feeling as much as you practically can - cry if you want to, throw a cushion across the room and curse if you want to (did that last week!), lie on the sofa and watch crap telly if you want to, talk to friends if it would help too, or whatever else you need to do. Give yourself permission to work through this as you need to, and be kind to yourself.
Sorry about the long post - hope it doesn't sound too "me, me, me", but just wanted to show that I was where you are a couple of weeks ago, and how things have changed in my case. Hope you will recover well too, in your own time. Take care x