Hello. i lost my virginity on the 13th of feb. took a plan b pill in the morning. i started bleeding very little on the 20th and am still bleeding for?

Question incomplete: Question is incomplete, but... Plan B can alter the menstrual-type bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B and other emergency contraceptive pills work most of the time, but not all of the time.