Morning after pill

January 8th my husband decided he wanted to hold me down and have sex with no condom. Ok fine. We are separated so we don’t ever have sex now. But this time he decided to come in inside of me. Took the morning after pill the next day. Have my period the end of January. February? Nothing! Nada! Zilch! Like wtf?! Can the pill cause me to be this late?? I have taken 4 test all of which are negative.