AF in 3 days HELP

LaLa

I took this test yesterday and got a positive I took tests prior but they were negative. After I took this I wanted more confirmation before I told hubby. Every test I’ve taken since is negative... whyyyyy we’ve wanted a baby since our daughter passed last April and this past March I had a miscarriage can anyone please explain? I’m having headaches as if I am... kinda nauseous i dont know just need help