Anyone with around a 35 day cycle? When do you ovulate??

Ky 8-15-17👼🏼 & 10-28-17👼🏼 Pregnant with my🌈💕
My cycles are around 35 days. I'm on CD21 and still haven't gotten a positive ovulation test. Anyone else that has close to a 35 day cycle?? When do you usually get a positive ovulation test??