Hi and welcome to HCM Since these pills ( i pill) contain high doses of hormones, these can disrupt the normal hormonal and period pattern causing period/bleeding abnormalities and appearance of new symptoms. What you are experiencing is a side effect of i pill, but no need to get tensed. Your next periods will be normal. But dont take emergency pills as a regular birth control method, they are not safe. If you are not planning for a baby, but intend to remain sexually active, you should consider getting started on suitable regular birth control measures to be protected (after 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 doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle. Regards Dr Santosh