Hi, I Have Used I Pills Nearly 1 In A

Hi, i have used i pills nearly 1 in a month for 6 months 2 years ago in order to avoid pregnency as we both are job holders and planned to postpone it. But after that we stopped it and started using condoms.Now me and my husband are planning for the baby.We stopped using condom also and trying for the past 3 months for getting pregnency. but no result.can u tell be whether this is because of taking i pills ?