I had an partial hysterectomy and i have had 2 miscarriages in the last month.. how is this possible?

It is not possible: Once the uterus is removed, pregnancy is not possible. And 2 miscarriages in the same month is not possible. There are some conditions that give a positive pregnancy even when there is no pregnancy, such as germ cell tumors of ovary or phantom HCG syndrome. If you have a positive pregnancy test and no uterus, you need to see a gynecologic oncologist.