Firstly if you miss a period whether intentionally or not , it does not mean that blood is accumulating inside your stomach .
If a period is delayed by 5 days or more, consider it late!
POSSIBLE REASONS FOR MISSING A PERIOD:
• Pregnancy
• Breastfeeding
• Stress stress stress
• PCOS
• Low body weight
• Obesity
• Birth Control
• Chronic illness
WHEN TO SEE A DOCTOR!
• If your cycle is less than 21 days or more than 35 days
• Miss a period for 3 consecutive months
• Bleed more than 7 days
• Debilitating menstrual pain
• Bleeding after you have menopaused