I had unprotected  sex with my fiancé on Valentines day and l was on my 5  day of my period, 2 days later l took plan b, so now l am 29 days late l missed my period this month, but I being taking pregnancy test with one week of difference and all of them came out negative/not pregnant.. I already took 4 pregnancy test.. Is this normal after you take plan b... But it is so weird to me because this is the second time l took plan b, the first time everything was normal and my period came on time.