A LONG while back I had taken plan B for a scare, after lots of waiting I had finally gotten my full period that lasted around 5 days. Then I was due for my next period on Christmas which was yesterday, but its still not here. I have gotten the symptoms I usually receive like discharge and some stomach aches, but its still not here. I have not had sexual contact since before I took plan b. Is this normal? Is my cycle just getting back on track or is this something I should be concerned about?