At this gestation you need to confirm there are no products left in the uterine cavity by ultrasound. If there are it needs treatment as it might lead to infection .

It's not normal to have miscarriage. It's a sign of unhealthy body and Hormone imbalance. Miscarriage can be completely prevented by healing the root cause of problem. It's frustrating to see that so many women are suffering and not getting the right information . There is no reason why anybody should suffer with this traumatic event. It's possible to get a healthy baby. Root cause needs further evaluation with blood tests, scan etc. Can be healed with diet changes, lifestyle changes, self care and regenerative detoxification. Hope this helps....

I hope you are under care of a gynecologist. If not rush to one immediately. The doctor will examine you and if required do a sonography to see whether the embryo is there in the uterus or has been expelled in the clots. At 4 weeks the embryo is very small, but the covering of the sac containing it is bigger, hence the embryo may be expelled and the sac may remain. So it may need treatment like admission, a curettage to remove this sac. If the sonography shows your pregnancy is fine, you are having threatened abortion and may need injections, tablets and bed rest to help the baby grow, till 3 months are over.