Sorry you are going through this OP. I've lost 3 pregnancies, the last 2 were MCs, the last of which was last week at almost 10 weeks. The previous was at 7 weeks.
Both started with brown spotting, then pink/brown mucous, but only when wiping. Both started in the afternoons and had progressed to needing a pantyliner by the evening and getting more red. Overnight, not much at all.
The one at 7 weeks, I had no pain at all. I went to work and carried on. Bleeding got more red, then I MC'd whilst at work. I suspect that being on my feet helped move things along and work distracted me somewhat.
The on this week progressed similar. Bleeding got heavier, pain got worse and crampy and I knew my cervix was likely opening. I passed the pregnancy 24hrs after the bleeding started.
OP, if you got BFP 5 days ago, are you around 4.5 weeks pregnant? You could try calling you local EPU, but I'd surprised if they would scan you. I called 2 EPU's when I MC last week, and both said they weren't scanning anyone, except in emergencies. I physically had to go there twice, to take in the pregnancy for genetic testing (3rd loss in a row now and no children) and even though I was already going there, they still wouldn't scan me.
If your blood group is negative, I'd check with your GP whether you'll need anti-D, to help prevent MC in future pregnancies. There is a forum on the miscarriage website which might be helpful. They also have a helpline and many FAQ's on their website.
Paracetamol and a hot water bottle can help. If you have any questions, just ask. I hope you are doing ok? 