Postpartum hemorrhage is excessive bleeding following the birth of a baby. About 4 percent of women have postpartum hemorrhage and it is more likely with a cesarean birth. Hemorrhage may occur before or after the placenta is delivered. The average amount of blood loss after the birth of a single baby in vaginal delivery is about 500 ml (or about a half of a quart).
You can do a medical abortion at home until the 12th week of your pregnancy. More scientific information: Medical abortion has been shown to be effective through the first trimester (12 weeks) and has been successfully used during the second trimester.
After an abortion, the pregnancy test can remain positive for over a month. One way to tell if you are pregnant again is to get a pack of two home pregnancy tests. Take one test at least one week after the day you think you conceived. Take the second test one week later and compare them. If the second test is darker than the first (more positive) it is probably a new pregnancy.