Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. There is a high chance of the hormonal imbalance as you took 3 packs of the postinor 2. It cause earlier/delayed period and excessive bleeding. Other side effects are: nausea or vomiting, dizziness, fatigue including headache, breast tenderness, lower abdominal pain or cramps, and ovarian dysfunction. So, do not use postinor 2 as regular contraceptive. Salt solution after sex does not prevent pregnancy. If you get pregnant then you can terminate the pregnancy by abortion pill containing mifepristone plus and misoprostol under the supervision of a gynecologist. Avoid stress, take healthy diet, drink plenty of water, and do regular exercise. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Dholariya Sagar Jayantilal