should i take postinor2 again?

Hi,
Welcome to ehealthforum,
Emergency contraceptives work in preventing pregnancy if taken within 48-72 hours of unprotected intercourse. The protection from these pills last for next 12 hours. If you have had repeat unprotected intercourse after 12 hours of taking the last pill, you might not have protection. The delay in your periods could be due to pregnancy or due to hormonal derangements caused by the emergency contraceptive use (as these contain high dosages of hormones). Wait and watch for your periods which can be delayed. If pregnancy is suspected, consider visiting your doctor/gynecologist for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). If pregnancy gets ruled out, and if you are not ready for pregnancy, but intend to remain sexually active, you should consider visiting your gynecologist to get started on suitable regular birth control measures to be protected (after your periods). Be regular with birth control use as instructed. Avoid having unprotected sexual contact if you are not ready for pregnancy. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle.
Take care.