Menstruation postponed 9 days to go to the hospital for examination without pregnancy chest pain bel

Menstruation delay 9 days to go to the hospital to check no pregnancy chest pain belly, first consider may be the detection time too early, did not detect pregnancy, you can go to the detection in a few days. Secondly, there may be irregular menstruation, menstruation is vulnerable to emotional, bacterial infection, drugs, diet, environment and other factors.