I have a question. My period is irregular (which is normal). But, can I take the bc pill? I start on the first day of my period and after 21 days i have a pil l break, when my period should come. What if mine doesn't come. I've been one month several times without my period and I wasn't pregnant. My situation is normal,but can I take the pill? Will it come on the pill break? What if it doesn't?