ladies who have had a miscarriage, it's been a week since i miscarried, how long did your alls…

ladies who have had a miscarriage, it's been a week since i miscarried, how long did your alls bleeding/period last? also every time I get up to walk even if it's just to go to the restroom my head just pounds and have to go back and lay down even if I'm sitting it hurts, have any of ya felt this way before after a m/c?