I'm terrified

So the last time I had sex was Tuesday August 29th right and we did it multiple times and it was the last day of my period. Well more like the day after the last day. And we did not use condoms. And I still haven't gotten my period. I took a pregnancy test three days ago and it was a strong not pregnant but I'm still terrified. It's my senior year I don't wanna deal with having an abortion and all that drama I cannot have a kid right now I have too much ahead of me. Might I be pregnant????