Hi. My Name Is Alicia. I Am Currently 17 Days

Hi. My name is Alicia. I am currently 17 days late for my cycle. I have not been having protected sex but he has been pulling out for years and i have never gotten pregnant before. Not under any stress at this time, I have taken 2 home test but they are negative. I dont have any symptoms of my cycle coming anytime soon. but no pregnancy symptoms either. What is going on?