Taking birth control had period in the middle of the pack had sex no condom..should pregnancy be a concern? i take my pills faithfully

Should be okay: sometimes, some people can get breakthrough bleeding while on their pill and they can confuse that for a period. as long as you take a pregnancy test and it is negative, you should be fine. If the bleeding keeps on happening irregularly and unpredictably, you might want to consider a different kind of birth control pill with a higher amount of estrogen. Hope that helps, good luck!