Opinions

So I had my what I think was my last period on feb.27. It was a weird period it was three days late and its wasn't as heavy as in would normally be. But it was a period so i thought nothing of it until I went to the doctor yesterday and she said that I may be further along than I think. I don't remember feeling any different but I could have blocked since I thought I had a period? So should I still just count the one in feb. Or just the one in January.