Getting frustrated

Af was due the 18th and still no sign of her :-/ have done 6 tests now 4 negative and the last 2 were invalid dodgy tests. Will be testing again in the morning but I'm just getting so over it :-( last cycle I was 6weeks late and ended up get af. That really tore me to pieces don't know if I can handle having that happen again :-( 
​Wish we luck for tomorrow morning :-/