Are they effective?

So I'm taking birth control again for my cramps. Only this time I'm not feeling any of the side effects I was feeling the first time I was taking them. I read that you can take the combination pill once a day at any time of day but other sites said that it has to be the exact same time. So I was wondering... show more So I'm taking birth control again for my cramps. Only this time I'm not feeling any of the side effects I was feeling the first time I was taking them. I read that you can take the combination pill once a day at any time of day but other sites said that it has to be the exact same time. So I was wondering if I can continue to take them at different times or does it have to be at the same time? I'm taking the combination pill Microgestin Fe
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