Had Sex for the first time Should I be Worried I'm Pregnant?

As the title says I had sex for the first time with my boyfriend and have had a lot of...feedback from my parents about it. My dad's pretty convinced I'm pregnant. Now here's the TMI part 1, We had Condoms, 2, Frequently checked the condoms, 3, Did it on my Period, 4, While wearing the condom he didn't come at all to limit the risk of me getting pregnant So I personally feel I was safe but I'm not to sure now (not on birth control and am trying to get on it soon)

I offered to take a pregnancy test to put my parents at ease but my dad says they lie alot but for my own sanity since there making me worry now I wanna take some but I'm not sure when I should?