Pregnancy

I don't know where to post this so here goes... I had sex back in April (a random hookup, I was drunk) but it was during my most fertile days. Well, I had a period during May and June but they were super light as usually my periods are 7-9 days and SUPER heavy. Well this month I'm already a week late. I took two pregnancy test in April and they were negative but now I'm scared I just took the tests too early. I'm 17, I can go get a pregnancy test but I just can't take it whenever due to the fact I live with my parents. I just need some words of advice. I don't know what I'd do if I was pregnant....