3 daya late. I know blue dye isn't reliable. FMU. Took blue dye expecting nothing so dumped the cup. Saw this so grabbed a FRER and managed to pee a bit more into cup and tested. Looks negative. All within time windows.

Update: 4 days late. Took amazon cheapie and its BFN. So I'm assuming the blue dye was a fluke. 😥 so next question. How do I kick start AF to try again! Pic at bottom