"had a situation with my boyfriend when the condom broke, he was very concerned and made me promise to take plan b. i was hesitant because i knew i had already ovulated that month and reacted terribly when i tried to start taking birth control so i worried about side effects from hormones, but i know it is better to be safe so i went and bought it the next morning. i took the pill and for the first two days the only side effect i felt was extreme fatigue. now about one week later my skin is breaking out, anxiety is at an all time high, my breasts are very sore and i&#039;m nauseous on and off. (all typical for me before i get my period) i&#039;m now 3 days late on my period but i can tell it will start soon. apparently it can mess up your cycle."