First of all, get a checkup quick! A miscarriage is not a joke, get checked make sure your body has recovered and try again. This is a home remedy to help aid you in cleaning your uterus and its not dangerous (unless you're allergic to it) is aspirin. When your period begins take a couple of aspirin, it will thin the blood so it will come out faster but it will also clean your uterus. A couple should do, the first day of your periods for a few months.
This was an old days trick in my culture, for women who could not get pregnant. It worked in many cases. Remember, if you're allergic to aspirin, don't try this!