Hello, I Have Had My Period On 25th Of August

Hello, I have had my period on 25th of August on 1st of September I had unprotected sex and the second day i took an Escapelle pill. I had a 4 days bleeding after 7 days from takin the pill then on 14th September I went to the doctor for a pregnancy test and it was negative. My periods are regular, so i was supposed to have my period on 23th of August . Now i am almost 2 weeks late . Does it mean i am pregnant ? I am too scared to find out