If your period has been delayed for 5 days and your stomach is always aching and you are tired when you walk, it may be a symptom of impending menstruation, or it may be a sign of pregnancy. It is generally recommended to do a pregnancy test, combined with the specific cause of the corresponding treatment. The delayed menstrual period and the symptoms of vague pain in the stomach and tiredness when walking are likely to be the manifestation of the onset of menstruation. Before the onset of menstruation, due to the pelvic congestion, as well as the body of the prostaglandins increase, abdominal pain and body fatigue and other discomforts will occur. It is generally recommended to rest, avoid staying up late and eating stimulating foods, apply hot compresses to the abdomen to relieve the pain, and closely observe the onset of menstruation. For women who have a history of sexual intercourse, a 5-day delay in menstruation, abdominal pain and fatigue are likely to be pregnant. After pregnancy, due to the hormone level increases easy to appear body weakness, fatigue and other discomfort, coupled with the fertilized egg implantation, embryonic development to stimulate the uterus, there will be a hidden pain in the stomach symptoms. You can use early pregnancy test paper to test, combined with blood HCG test to clarify. If the diagnosis is pregnancy after slight abdominal pain and fatigue is a normal early pregnancy reaction, do not need special treatment, the early stage of pregnancy moderate amount of supplemental folic acid, avoid fatigue and sexual life.