I'm super confused

Sarah❤️ • I am happily married with a beautiful son. I am currently pregnant with my rainbow baby! 💛💙💜💚❤️
First pic was last nights test. Taken around 5pm. Second pic was this morning with fmu. What in the world? 😔 I'm so confused. 17 dpo. Thought I had my period, but it was just light spotting. And it's done now. Going to the doctor tomorrow. But why would I get a positive on one, then the frer come back negative?!