Hello,
I had a period two weeks ago which was three days late. Now two weeks later I'm bleeding again,could I be having another period even though I already had one? This have never happen to me before should I be concerned?

Yes go check that out...

Do not panic that has happened to me I can't tell you how many times. However I do think that you should go and have a pap just to be certain and put your mind at ease. My periods were so messed up a few years back and all they did is put me on the pill to regulate it. Don't worry you will be fine