I’m so scared

So the only time this month I was intimate was 2 1/2 weeks ago. It was *mostly* safe.. it started of without a condom but he then ejaculated into a condom once we finished... My period is always regular and it is a week late today which has NEVER happens... & 3 weeks DPO supposedly...

the pregnancy test is negative but I really can’t stop panicking... what if I got pregnant form precum or his sperm leaked out the condom when he finished and I was still going.. what are y’all opinions? Idk if I’m seeing things now...