Neg and Pos

Sammy • 18 and TTC with my boyfriend❤️ My snapchat is sammynicole9 for anyone that wants to talk/be friends😇

I took a pregnancy yesterday evening and there was a faint positive line but I took one this morning and it was negative.. The picture below is the one from last night... What does this mean?? I was supposed to start my period October 5th and haven’t cramped(I usually do before I start) or even spotted. I’m 16 dpo today