I'm very confused right now, I'm hoping someone can help me out. I am 11 dpo today and have been testing everyday. I've been using FRER and Dollar tree. They've been negative until today. Earlier today I took a Dollar Tree, I looked at it for a minute or two and no line. When I went back and checked it later it was positive and almost as dark as the control. I then took a FRER and it was negative. What do you think? Could the Dollar Tree be a false positive??