Heya hun, have just spotted this thread and thought i'd chip in. The almost exact same thing happened to me, a little mishap with a vibrator. I went inside but not too deeply at all and when I was done, the whole thing was covered in blood (TMI sorry :S ). I rang my MW in a total panic and she said to ring her back if it hadn't settled within a few hours. The bleeding stopped being fresh, turned pink, then brown, then stopped and when I went for my 17 week appointment (3 weeks later!) I heard babs' heartbeart stong and regular. All in all, the bleeding did last about a week but it was all old blood.
I really hope this is just what it is for you hun, just do what my MW told me to do, rest up and keep an eye on the blood, i'm sure that you just nicked a blood vessel is all. When I came clean and told my OH what had really happened (I lied to start with, was soooo embarresed!) he rolled around in hysterics and he still thinks that it's massively funny now....
HUGS
xxxxxx