Generally, no. It takes the proper hormones to have this happen and the normal period cycle is 28 days. You can not force this to happen ( say for instance you are going on a trip and want it early)....
Your period starts when you begin to produce the hormones for having one. This is called puberty. Several factors are involved and one of them is your DNA. Most likely you will begin your period...
Did you miss a pill? Important to be very consistant. If this happens for more than 1 or 2 cycles, if you are a faithful pill taker, contact your MD. Especially if you are on a low dose pill. This...