.Technically you can not get your period if your pregnant because you dont ovulate.
.Saying that it .I.S possible to get some bleeding when your pregnant.Its called implantation bleeding and generally occurs when your period is due.
The bleeding is very light (appearing as red spotting or pink or reddish-brown staining) and lasts only a day or two.
.It could be an early miscarriage,it's very common.It usually happens when the fetus is unhealthly and has little chance of survival.Some people have these before their period is even due and don't actually realise it is a miscarriage.If this is the case you would normally experience vaginal bleeding with blood clots and abdominal pain sometimes with severe pain in the lower back.
.Good luck with everything

.If the bleeding still seems strange and unusual to you,best bet is to go and see your doctor.He'll be able to say for sure.. :d
***nay