It is possible to have spotting or a little more bleeding than that on your expected date of periods for first 3 months of pregnancy and yet all will be well. Still to be on the safer side , it is best to take complete bed rest and a scan if things dont settle in a couple of days. See your gynaec thereafter as she may need to put on some medication if you are threatening to abort. Abortion in early days of pregnancy is a nature's way of getting rid of an abnormal pregnancy. Such pregnancies are not repetitive so not to worry . Take care and all the best !