AF late, 9dpo

Hallie
AF was supposed to come 12/18. She didn't come and still isn't here!! I have no AF symptoms. 
I have sore breasts and nipples which is unusual for me! 
I also have horrible indigestion! 
I have been taking cheap tests but all day BFN
I also am 9 dpo
Any advice? 
TTC #1 😊