Someone help me out?

I took a test last night and got what I thought was a faint positive. I could see it without editing but it was hard to see on a picture so I edited it. Here it is

But then I took 2 this morning with FMU and they are completely negative

Today’s

I know HCG doubles every 48 hours but shouldn’t I still have gotten a faint positive that matched last nights?

Thanks for checking!