hello See hormonal levels take time to settle after a pregnancy or abortion. So some symptoms might be in their regressing phase so you shouldnt worry about them much. But still after any abortion be it spontaneous or induced , one has to confirm if the abortion process was complete ie your uterus is empty with no products of conception remaining. If its incomplete , it can lead to pain, cramps in the abdomen, get infected with passage of foul smelling discharge. So i suggest you get your repeat ultrasound to know if the uterus is empty. Once the ultrasound is normal you can take up a course of anti inflammatory agents like ibuprofen for a week along with antibiotics if you dint start them after your abortion. They would settle your problems of backache Besides do maintain a good nutrition and fluid intake along with proper sleep as you have gone through an abortion.