Hello doctor, My girlfriend is having missing period. Her due date was 29th June and its 7th July today, still she didn't have her period. We had unprotected sex last month around 15th or 16th June. She had her home pregnancy test twice and both came negative. She doesn't have any symptoms of pregnancy. I'm not getting why she is not having her periods. She is having stomach ache for the past 2 days like the one which occurs before mensuration and still she didnt have her period. So what medicine in Bangladesh she can have which will help for her periods. I'm really worried as we are not married and she cannot tell her parents about it. She is 19+..... Please reply as soon as possible.... Thank You !