I Am 29 Years Old. I Have 2 Years Old

I am 29 years old. I have 2 years old baby girl. In december i am having sex with my husbund.But condom was break. So i took Ipill and next day my periodes was started. Actually my periodes dat is same for shedual.Means my date is 6 and after took Ipill , at date 7 des my periodes was started.But in month of january my periodes was dely by 5 days. I consult gynecologist, and she suggest me to take medicine of cycloreg 3 times in a day. My home pregnency test is negative. But till now my periodes is not started. Is there any chances for pregnency? I am not planning for 2nd baby. So, kindly reply me.