first of all relax. you are not pregnant. your periods came early because of i-pill medicine (emergency contraceptive pill). sometimes it can make periods come early and sometimes it can delay. in your case it made your periods early. but i want to caution you that you should not use i-pill medicine in daily routine as it is a very strong medicine and have side effects also. in your case you did not even need to take i-pill because your periods finished on 12th and you had sex on 15th. you cannot become pregnant if you do sex in the first 10 days of your periods. for further information consult an internal medicine physician online --> <link>
i bled after i-pill but missed period on due date. am i pregnant?