Gosh the docs sound awful, can't believe they treated you so badly. Glad the scan went well and everything is ok.
I have had exactly the same as you, i had a huge bleed at 7 weeks - and like you there was no slow build up just an almighty gush of blood when I went to the loo. I had a scan and again like you they could see where the bleed was in my womb and said it was outside the sac and I may get some more bleeding. I haven't had any more heavy bleeds but I have had brown spotting ever since, only now at 9 weeks and 2 days does it finally seem to be coming to an end (I've had practically nothing today but originally I had spotting every time I wiped after going to the loo and (sorry for TMI) it was usually worse after a number 2.
In the last 2 weeks I've spoken to 2 doctors and a midwife at my booking in appointment and none of them were even slightly concerned, the midwife said so long as it is brown and there is no cramping then I shouldn't worry and that it's to be expected after a heavy bleed.
I hope that helps reassure you a bit, it's certainly reassured me hearing that you have been in exactly the same situation as me.
Sorry to hear you have had such a bad time, what shocking treatment you have had, so pleased all is ok you take care x x x
That is horrendous but glad everything is ok! Hugs and take care x
Really glad everything is ok - sorry you had such an awful experience.