ugh, felloutofbedtwice and ericaj - i really, really feel you.
first things first - i'm still pregnant, 12+1 (touch wood, dating scan isn't until next week).
BUT - yes, i had a bleed at 6.5 weeks, absolutely heartbroken and convinced i'd MC'd since I previously had a MMC and the only sign was some brown spotting. trudged into the EPU for an internal u/s only to be utterly shocked to see a heartbeat. the monographer told me i had a subchorionic haematoma, very small, almost too small too see (but big enough to scare the shit out of me with a sudden bleed, clearly).
it died down after a couple of weeks but came back twice, once at about 8 weeks and so frustratingly, after 3 weeks of no spotting whatsoever, suddenly at 11 weeks too. all three times i've had scans and everything has been FINE.
don't be afraid of the 'dildocam', it's the only one that lets you get a clear view from some angles, which could very well be where a haematoma is hiding. and it's so much better to know where the bleed's coming from. (also, let's be frank - presumably it was something of roughly the same dimensions that got you into this situation, so sure you can handle it!
it's really not painful at all, honestly!]
in my case, the SCH is completely separate from the gestational sac so doesn't pose any real issues besides being bloody scary when it rears its head.
if there's an EPU near you, please just go in for a scan, to ease your mind. and good luck x