Is There Any Possibility Of Becoming Pregnant After The Family

Is there any possibility of becoming pregnant after the family planning operation, bcoz i did not get periods . its already 45 days after last period usually i get cycle for every 28 days.. this is second time delay happened... last one year back i got period after 40 days. .. i am 43 years old.. i did family planning operation in my 33 age. i have two kids ( 16 yr and 10yr old)