Either 2 or 6 weeks
This period is not your true period because you are already pregnant.
Possibly you conceived about 2 wks ago or so. Is this period lighter than usual? Assuming your periods are regularly 28 days, counting back to your last period would be 4 wks and you likely ovulated/conceieved 2 wks before that, thus 6 wks. These are just guesses. Consult doc for thorough eval to find out. Good luck.