Help!

Jessica

I tested on 12/13 and got a faint positive on a FRER 6 day sooner test then just tested just now 12/15/on the digitial version of that same brand and got Neg- . im now 11dpo but I'm scared ive tested too early cause my period was weird last month and only went 4 days instead of 6 days so wondering if this app has me wrong or did i catch a chemical pregnancy?

12/13 with FMU

12/15 with FMU