I need help...

So at my sxhool, they drug test for nicotine. I hit a juul a few times Saturday and Sunday, then was tested on Monday. My results come back tomorrow, and i don’t know what to tell my strict grandparents. I live w them. Keep in mind, I’m a senior on the cheer team and senior night is in 2 weeks. I’m just scared. Do i tell them i was peer pressured or what? Also, somehow, a dab pen ended up in our yard yesterday and they THOUGHT IT WAS MINE. i don’t smoke weed, so this just makes things so much worse cause they thought it was a juul. Help please...