Ovulation day?

Kaitlin • Married 4/6/13 together since 11/14/06, Endometriosis, 2 Rainbow babies, 7 angel babies 1 being an ectopic. Trying for baby #3

When would one ovulate after getting 3 days positive opks? My tests yesterday were darker than the previous day and today’s was still positive but not as dark. I plan to keep testing until I get a negative but unsure as which day I’ll actually ovulate.