Late period- help/advice!

Hey everyone! Quick question, I am 8 days late on my period but the last time I had sex unprotected was in March and I had my period in March and in April...has this happened to anyone else and should I be worried?? I am nervous about taking a pregnancy test because I don't want it to end up positive! 😩 I have been under stress a a lot lately with graduation from college and trying to plan my future! Any advice would be greatly appreciated!