I have tested each morning (FMU) using FRER for a week now. Tests got darker until this morning which is lighter than the last few days. I had a chemical MC last month so I’ve been testing this time to try and rule it out…my lines were only ever faint with the MC and never got this dark but the lightening today has really worried me. Be honest - should I prepare for the worst?

The strip tests throw a spanner in the works as they are the last 3 days (bottom being this morning) which is clearly darker than the other two. Why would the FRER be lighter / not progress when the strip tests clearly are?