vvvfl ??

My period is due tomorrow, both tests were taken in the middle of the day, and all we used was the pull out method. Last time I had sex was June 29th, and white & clear stuff is coming out of my nipples after I shower. My whole stomach has been off the last couple of weeks from diarrhea to no appetite. I'm not sure what is going on and I think that if I am not pregnant, I will need to go to the doctor. Also, I'm pretty sure the bottom test is invalid and I plan on getting a pink dye test tomorrow, I just need some opinions. Anything helps!