Hello I Had Used Birth Control Pill For 8 Months.

Hello I had used birth control pill for 8 months. I stopped using it on 27 December in between. Then I started withdraw bleeding on 29 December and it last for 7 days. But till today I dint get any period. Would u plz tell me what. I will have my first period after this withdrawal bleeding? I dint have sex after bleeding till now. So it is sure very much that I m not pregnant.