Could Missing My Period By 7 Days Be Due To Factors Other Than Pregnancy, Such As A Cut From Sex Or A Recent TR Injection?

Hi sir, I had sex with my boyfriend twice in month. We used protection ..while having sex... And now I missed my period... It s been 7 days late from my normal period cycle.. And I m worrying about the issue. Please clear my doubt sir.. Can be any other reason for my late periods late? And while having sex my skin got cut by his nail and i got tr injection too. !!!! Can this affect my periods or any other reason ?