help?

my boyfriend and i had sex on july 16, it was in my fertile window with a 11% chance of pregnancy. we used a condom, he pulled out BEFORE even being close to ejaculating and ejaculated into my mouth. i’m not on birth control. my period is 12 days late. we even filled the condom with water to check for holes. i took a test yesterday just to be safe and it came back negative. what should i do? i still have some weird cramps, not too severe, and they come and go randomly and just a bit of discharge here and there