Indent or chemical?

I had a pack of FRER so I decided to use them before I go buy another brand. I can’t tell if I’m getting indents or they’re positive.. I always take within the 10 minute time frame but since it’s not getting darker then it doesn’t seem like it’s real. These are all FMU. I am 3 days away from my period as of today.

2-9

2-11

Today