Talk to Gynecologist on Ecp Pregnancy Periods

i m am 21 years old and had unprotected sex with my partner on 18th of january and after that i took ecp within 1 hr of it even he didnt discharge inside me i got my last periods on 11th january and it ended on 14th January And after taking the ecp on the 6th day I start getting the brown discharge And after that i got blood for few hrs and then again discharge for almost 5 days. I did the pregnancy strip tests on 26th january and 29th january and it was negative. My periods date were expected to be on 8th feb and still i havent got the periods this is freaking me out. Please can you tell me that am I pregnant and when can i get my periods please help. Usually my periods is for 3-4 days and typical cycle is of 28days the last time i got periods was on 11th January and it ended on 14th January. I did the urine pregnancy test at home again on 11th feb and its negative. Can you please let me know that the result is confirmed as it did the test after i missed the periods. I was suppose to