If you take the pill more then 24 hours after your last one is it still effective? If so, up to how many any hours after is it effective? And does it give you 0% cover of just lowers the percentage you are covered to 50% or something. For example if I took my pill 36hours after my last one and had unprotected sex during the time would I still be 99.8% covered or would I be less like 75% or 50% or would I be not covered at all