When do opks get lighter after ovulation?

I tested day after day getting nothing but stark white then I read a million  bad reviews ,,, so I stopped testing... Two days later I decided to test again & it looked pretty close to positive & it may have been, plus lots of ovary aches ....but then today its still looking close to positive ... I'm thinking I may have ovulated the day i didn't test. But wondering for those of you who kept testing when did they get light again ?