Ovulation test and glow.

Do you ovulate before during or after glows predicted fertile week? My fertile week is almost over but I still havent gotton a positive lh. But last cycle I'm pretty sure I ovulated in the fertile week. (Going by cm) I kind of think I ovulated early. Should I just keep testing or just wait till after my next period?? What do you think. I only have about 16 tests lol