Haven’t experienced that po kasi nung nagkaroon ako ng menstruation a month after i gave birth, nagtuloy tuloy naman na buwan buwan. It only stopped when i got my first depo shot (as my contraceptive). Naaapektuhan kasi ng hormonal contraceptives ang ating cycle/menstruation. 🙂 If using contraceptives, that 'might' be normal. If you already had s*x with husband, you might be pregnant.