thats not a preflower. i have no idea why those plants have those things but even mine has em.
the preflowers start growing right where the branches are formed on the stem. right in that little V they form.
Hah I did turned out to be male . Got some Femenized Trainwreck going so hopefully no worries this timeSecond that. All plants have those. Give it some more time it's pretty obvious.