Clear and Simpe positive but Clear blue negative

[Adonaire22]

Hi

I am a couple of days late on my period. I took a clear and simpl test yesterday and the lin started developing very quickly and is very clear! I have attached a picture.

I took a clear blue this morning and it was negative!

I’m confused on how I got a false positive because I know its so rare!

Has anyone else experienced this?

Thank you xx

Someone more knowledgable than me will be along soon I’m sure but as I understand it, the pink dyes are more responsive than the clear blues. It was certainly the case for me with my daughter, a clear blue said not pregnant but when I tested the next day with a first response I got a clear positive. It sounds like if you tested again with a pink dye/first test as you may just be very early on.