The line didn’t get any darker?? (11 DPO today)

I dipped an HCG strip test, an LH strip test, and a FRER yesterday (FMU) and got this:

But then today (FMU), I got this:

(I only have one more FRER, so I’m waiting until the strip gets darker to use it)

It seems like the lines didn’t change at all! Is that ok? I know I’ve heard HCG levels don’t always double in 24hrs, but I’m worried. I still have sore breasts.. no blood..

Someone tell me this is ok.