Hello, Thanks for trusting us with your health concern. From the description you have given, it appears that you are experiencing side effects of the emergency contraceptive pill. The pill contains high doses of progesterone and hormone imbalance is created after its use. Ample protection is achieved with use of the pill soon after an unprotected intercourse. So, your chances of pregnancy are very less. You may see some withdrawal bleeding in a couple of days. Please wait for your next natural period which is likely to get delayed by a week or two. Please get further help if you become overdue by ten days. Take care.