I've not trusted FRERs since about the time I got pregnant (testing in late April last year). The thing that worked best for me was the dollar tree brand. Never failed. And they were a buck so I could pee on a million of them without feeling guilty or wasting money. Lol. Maybe try a dollar tree one? It picked up before FRER for me.
These were my first positives!!
Top was the night before. Middle is the blue dye. Bottom is the same sample as the blue dye.
Hope that helps!