yah my husband corrected me last night, its actually .01 percent chance since its 99.9 percent effective so it would be 1 in every 1000 women. Sorry its just i thought the same thing last night but then he corrected me, and i dont think so since i take them every single day at the same time, i dont take antibiotics or have not since last year.. so yah.. today is better. I woke up and ate a bowl of cereal and felt fine. I think its just my stomach reacting to stress at work.