I haven't had my period in the month of may expected on 27 th since I had my last periods on april 27 th and before that on march 23 rd. I haven't had my periods after april 27 th yet and haven't had any sexual intercourse or neither I am under any medication. I am just tensed due to this period delay since I am having slight premenstrual symptoms of back pain and stomach cramps and abdominal pain but periods not taking place. Is their any problem or any medical issue what should be done.