Blood Pregnancy Results came back

So my results finally came back. It's been 6 days since AF was supposed to arrive so I went and had a test done and it came back negative so I'm out. I just had a Pap smear done last month so I dont understand what could be wrong now. Why didn't they tell me last month during my check up that something was off??? They said everything was fine and my ovaries looking fine and even showed me a sonogram of my eggs getting ready to drop. I'm just frustrated we've been ttc for so long (right at 9 months to be exact) and we thought that this was finally our month since I've never been late like this before in my life. No signs of AF still but I'm tired of spending out fees to these doctors. I haven't had any symptoms in my body so I dont know what's wrong with me.. I plan to make one more visit and they better find an issue because I can't do this anymore.. it's just ridiculous!!! 😤😪😪