@BadBadBeans that sounds almost exactly like mine (This was 9+3) - browny string in cm when wiping, then red blood onto a pad, then tiny clots, period achy pains, quite an uncomfortable 'low' pressure, more red blood, sometimes no blood when wiping but then it came more next wee - constant 'wet' period feeling (sorry if tmi)
Rang midwife who referred to the EPU, they rang me back at 8:45 the next morning with a cancellation for the following day - achy period pains and cramps still persisting, blood when wiping, sometimes red, sometimes brown streaked.
The advice was if it was 'heavy' (saturating the pad within half an hour) then go straight to a and e, otherwise just sit and wait (and cry if you are anything like me)
Well, obviously I had my scan and the baby was wriggling about and the EPU nurse just said it was things getting into place! It is almost exactly the same as my experience a week ago, the aches and pains have gone now, and not experienced any spotting since - ironically panic and stress can cause extra tummy cramps too.
Keep your phone on loud, EPU will probably call back first thing when they get to the clinic, whether they can fit you in asap or in a day - but please keep in mind I had a very positive outcome with heartbeat and wriggles, with the exact same symptoms.
Also, try not to google - it'll be hard but there are better and worse stories out there, it isn't necessarily complementary with those of us experiencing those particular set of symptoms!