I took a First Response Rapid Response four days before my period was due yesterday and got a slightly coloured line that got darker after the ten minutes. Convinced myself it was an evaporation line.
Tested again this morning with FMU. Thought it was a BFN. Went to put on clean pyjamas, cake back 2-3 minutes later and there’s a very faint line. Barely a squinter in regular light but a definite line when you shine a light through the back of the window.
How common are evaporation lines on these tests? Would an evaporation line show up within 4-5 minutes? It’s a bit grey but definitely light pink with a light on it.
I’m planning on retesting Thursday but I’ve heard FR tests don’t show evaporation lines so I really want to have hope but I’m new to this.