Should I wait and take another test

So last night my friends and I decided to take a pregnancy test for the hell of it (my friends are fixed, about to pop a baby out, and I’m on depo) I always make sure my shot is up to date and take precautions to make sure I don’t end up pregnant so when I took my test there was two lines the second line was faint but it was definitely there and it wasn’t an evap line this morning when I fist woke up I took another test and it was for sure negative there was nothing should I brush it off or should I wait and take another in a week??