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.
You can end a pregnancy after a week, No one can tell you whether or not to do this, its your choice, what ever is best for you! The only way I know is to terminate the pregnancy by having an abortion but you really need to think about it.