If You havent missed or delayed your last depo injection, then you do need to take a pregnancy
test and a sonogram. It the tets are negative for pregnancy, and the sonogram shows no problem within the uterus
, your doctor may like to add estrogen
tablets for a couple of weeks. Apart for pregnancy, other problems like polyps, fibroids, ulcers on the cervix
also need to be ruled out. Go for a gynaec consultation and exam.