@TAEKJOOLOVER maybe you have hormonal imbalance which is causing a weird shift in your menstrual cycle.
My friend had that and was doing her period for a week. Next week off. The other week it starts again. For 2 months I think.
The best thing to do is to go to he hospital or gynaecologist to have that problem checked. Though it might look unnecessary, it's still important to avoid any problems as fast as u can.