sounds like it really is a mc. I think most EPUs take self-referrals, but you might want to phone first to check. GP will probably send you there.
EPU cannot stop an early miscarriage. They can only check whether the pgcy is still viable, offer treatment to remove the pgcy (ERPC), and offer support and monitoring.
When I went to EPU at 7w plus a few days I refused to be scanned as (a) it would involve an internal scan, which felt un-necessarily invasive given how fragile I felt, and (b) because I felt I would then be pressured to continue on the medicalised route of having an ERPC. It might shorten the bleeding by a few days, but at the cost of an even more distressing intervention. Many women choose that route - it's entirely up to the individual. But I felt that the mc was as natural as pgcy, and I wasn't ill so didn't need to be treated medically. I prefered to let nature take its course and let things move on gently. It was the right decision for me.
What I needed, which the EPU gave me, was a talk with a practical and compassionate midwife. She explained what was going on in my body, what I would be feeling, and what it meant. How to deal with it. Signs to look out for. She also took blood tests to confirm that my pgcy hormones were dropping. And a week or so later, when I was feeling very confused about whether or nit I was still pg, she did another blood test to confirm that I was not. And listened to me again and explained what was happening.
I think a miscarrying woman needs support, not 'treatment'. Your body can deal with this, it's your mind and your emotions that struggle.
It's horrible to have to break the news that you have miscarried just a few days after announcing the pregnancy. I told three members of my famly, but found ittoo distressing and asked my dad to tell the rest.
Look, this is really intense and miserable right now, but you will get through it. And you will feel well again and you will feel happy again. It just takes time and you have to allow yourself your own personal grief.