a bit confused....

Sophie • Married 6•18•16 One boy 5•18

help! My husband and I have been ttc for 6 months now. In june and july I took an ovulation test every morning and they were always negative....😨 I talked to my obgyn about this and she is now having me chart my bbt, but I'm so confused! What is this chart saying? I have a feeling that it means I didnt ovulate, but I'm hoping i read it wrong! 🤞