Ovulation ?

I got a positive ovulation tests on CD 19 which was 2 days ago . We had sex CD 19 and yesterday today is CD 21 and I’m having cramping and ovary pain ...? I don’t know what’s going on before when I never tracked ovulation I never had this so its really odd .. this was today’s ovulation test first line is lighter than the 2nd so im confused can anybody tell me what’s going on .