I had a period in early June, couple days after it ended I had unprotected sex, the next night I took plan b (within 24hrs). 5 days later I had pinkish brownish discharge the was light the next day and on the second day it was more of a flow but not as heavy as my actual period. The third day it was lighter and just stopped that afternoon. I am now due for my regular period but it hasn't shown I'm giving it till the 15th. My question is that "period" about a week after I took the pill is that what I should count from as if it were a real period? I've taken plan b before and I've never experienced any thing happening everything has always been normal. I also plan on getting on birth control.