TW: is this implantation bleeding?

Dianna

The 1st day of my last period was June 17th. And I’ve missed my period so far this month.. according to the app I should be 12 DPO. I’ve tested but they’ve come out negative, I thought I could see a VVFL.. but I wasn’t sure. Is it possible I’m pregnant? For reference, I just got my nexplanon out on June 25th.