I just don't understand!

So been actively ttc a year and even longer not preventing it with my husband.. starting seeing a dr over it and my bloodwork all came back normal! I'm scheduled next for a vaginal ultrasound to look at my ovaries and hubby has a sperm analysis coming up as well. I'm just so frustrated and confused about this. How can everything be normal? I have super irregular cycles and absolutely no luck with a bfp.. never even had a positive opk... any similar stories? Success? Did you have any treatment?