I started taking microgestin fe 1/20 birth control mid cycle and i will have finished all active pills (taken for 3 whole weeks) by the time that i see my boyfriend. i have seen that it takes anywhere from 7 days to a whole month to be effective when taken mid cycle. will it make a difference to wait until after the placebo week? (because i know that doesn't contain any hormones) is it safe enough to have sex with a condom after being on it for this long?