How long did you bleed for?

I miscarried at 9 weeks. The doctor appointment was very quick. He gave me an ultra sound, said im sorry, you won't need a d&c and then sent me off?    Am I meant to go back for a check up? How long do I bleed for? It's all pretty traumatic, I know nothing? Did any of you find out why it happened? I've made my own appointment with another doctor for 10 days after it started. Just cause I'd assume I should? Got no information accept for all the conflicted stuff on the Internet!