Anyone else have trouble figuring out when they ovulate?

Ashley
My husband and I have been ttc for 9 months. AF has the only visited 2 times in 6 months. I've only actually had one positive ovulation test. Not sure if I'm doing it wrong or if there is something wrong. I've been to the dr once and they tried to put me on birth control....didn't even ask if I was ttc then blew off my questions. I also have thyroid problems so that doesn't help! Anyone else have extremely irregular periods? How did you figure it out when you ovulate?