Hi, so I'm 17 and last month, I seemed to have skipped my period, my last cycle started 28 October and ended 1 November.. Usually lasts 5 days. It is now december and my period started the 21st December. Can I expect it to last 5 days as usual? Is there a way I can lighten it or make it go away faster as I have a special all white event to attend on christmas day. Please help.