For 16years have been menstrating, this is the first time this is happening. In nov 2012 my period was on d 30th, I expected another Dec 30th, it came but lasted not even up to 24hrs with few drops. Why? I had a HVS test on Dec 12 which says I have moderate growth of staphylocuss. I had sex on December 10 and 26th,I don't know what is the cause?

Changes in body, just miss period, it is going to be late this month, pregancy, STD, you name it, it can be many things