Firstly, since you had intercourse during the safe period, you need not worry. As you took the emergency pill, chances of pregnancy
are almost nil. As the pill contains excess hormone, disturbances of the menstrual cycle like spotting or a delayed period can occur and this settles in a couple of cycles. You can test for pregnancy at home by taking a HPT with an early morning sample of urine. You can visit your doctor for further advice. Good luck.