I Had Unprotected Sex After My Period On The 30th

I had unprotected sex after my period on the 30th of sept and I used sedinor 2 an hour after and also after 12hrs the next day, I have been having pregnancy symptoms like sore nipples, hard stomache. I tested negative but I haven't still seen my period, and that scares me alot. The initial period b4 I had sex came a bit earlier because I used contraceptive pills.