Hello doctor please ineed your help, isaw my period on the 5th of feb to 9th and ihad sex on the 17th to 19th which was the day my ovulation started and itook postnor 2 on the 20th then I had sex from 22 to 26th and my ovulatin ended on the 24th now my period is late,am having lower back pain, and abdominal pains,and my nipples are had could it be the postnor 2 the is delaying it or ijust might be pregnant