When should i expect my period after plan b1step. bled from 10-18th expected period on the 17th. usual 23-25 day cycle.

Hard to guess: Plan B can alter the menstrual-type bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. Only time will tell, when the next period will come, but cycles should return to usual... within 3-6 weeks. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B works most of the time, but not all the time.