I have just started my 3rd pack of BCP and the last two months were in sync almost. 1st week of pills: nothing. 2nd week of pills: spotting/brown discharge for a couple days. 3rd week of pills: nothing. 4th week of pills (placebo pills): nothing, then one day or two of brown discharge. But no real period. Is this normal? Or do I need a different kind of BCP?