how can i maintain my period?

First, what do you mean by it's not normal and you're feeling something wrong in bleeding? But to address what you feel is the problem and what so many women 'suffer' through, irregular periods. Most women don't have a normal cycle or preset day for their period. This is where Birth Control comes in. It can be prescribed for a number of menstrual problems, not just to prevent pregnancy. Regulating a woman's cycle is one of the uses for it. I would consult your doctor and see if they would give you a prescription for the Pill. Best of Luck!