Maybe vfl cheapie, negative frer?

I had a strange line appear within the time limit but I can’t tell if it’s valid. I got excited anyways and used a frer and it is definitely negative. I dipped both tests in the same urine so I know it’s not diluted. I didn’t take the picture until about 10 minutes later so I know it looks old but that same line was there just a little bit lighter and missing the center as pictured. I am 10dpo and am on progesterone so always have some kind of symptom during the TWW 🙄. Has anyone experienced anything similar and ended up with a positive down the road?