Why now?? (Needing to vent)

I'm so friggin mad. I'm mad at myself, I'm mad at my body, I just want some answers! For as long as I can remember, AF comes every month. So why is it that as soon as my husband and I start TTC, AF is no where to be found and no signs that she will be arriving any time soon? I've taken 3 tests over the past 3 weeks (all of them after AF was supposed to show her face) and all 3 are a bfn! I'm on day 63 of my cycle... This isn't normal. The earliest I'm able to see my doctor is 2 weeks from now. I'm over two months late for AF. Why now?! Why when my husband finally agrees that he is ready to start TTC?! Im so upset because there's nothing I can do. I feel so helpless 😔. I don't have any friends or family member or know of anyone that is TTC, so I don't have anyone that can relate. My in-laws are more excited that we are TTC than my own parents are. It hurts that when I try to talk to my mom, she is dismissive and doesn't really care. My husband just tells me to try and not worry about it, but he doesn't understand what it's like too have no clue on what's going on with your own body. I feel frustrated and alone.