Had unprotected sex on the 20th April. Took postinir 2 on the 23rd april. My period started the next day 24th April, but was full of blood clots. I completed the 5 days period. I was expecting my period on the 21st may. But already on the 13th of may my period started. That is exactly 1 week before the expected date. This time it flowed in small drops for only 3 days. Pls what is happening?