My period is delayed, I don't feel like taking a test

Guys, I’m seriously losing my mind. We are really careful every time, but this month my period is about five days late, which was never the case before. I bought a test from the pharmacy, but honestly, I’m scared to take it because I’m not ready at all. School is not over yet, and if my family finds out, they’ll ruin me. Please give me some advice, does this stress cause a delay?