I used to have my period that last 4-5 days and with a decent amount of blood. But for the last few months, it has been extremely less blood than before. It only lasted for 2-3 days.. And now, I suppose to have period soon, but there is some spotting going on, and I don't know if that is my period or spotting.If it is my period, its the least blood that I have ever got.If it is spotting, should I be worry about it?