Am I pregnant?!

Hi guys, I’m new to this but! I’m scared I might be pregnant. I’m due to have my period by the end of this week and I’m scared I will not get it by this week, I took a test and it came out negative but it might be too soon to even know? Any advice?! I usually get my periods around the early 20s and I’m not sure how long my cycle length is but it says from 25-27 days! I had sex the 6th, last day of my fertile window, and then the 12th this month?!