so in my case what i di was that i had unprotected sex with my boyfriend on 8/13 and took plan b on the 14th and on the 15 i got my period it was a week early and lasted the 5 days. on the 19th n 20th i had unprotected sex again with my boyfriend again and took plan b on the sunday. so 5 days after i took the second plan b i got my period again on the 27th and it lasted till the 30th. what are the poccibilities of this happening and is it normal?? what could this be?