Af due 17th any positives?

Michelle • Hi iv 3 boys and would like a girl. I`m 36 now and all my friends think I`m mad. I can`t bring myself to tell mum we r ttc she will hit the roof, but I`m so broody I don`t care xxx
I caved and tested today, stupid early response recons that it's 84% accurate if ur testing 4 days before af. So I got a bfn and now feel miserable and I was determined not to test till weds. Think I have af symptoms tho but I still have a crazy sand paper like dry mouth... Anyone tested that's due on 17th? Anyone had a positive to cheer me up xxxx