Ovulation days 17, 18. Period lenghts 26-28 should i see a doctor????

Elif

Hello girls, I've made 3 ovulation tests for my 3 cycles resulting positive on 15th, 16th cd. I think I'm ovulating a bit later. My periods generally 26-29 days. We're ttc for 6 months. We've tested my husbands sperm and nothing wrong. Doctor just checked me normally and said nothing wrong. However this late ovulation thing confuses me. Do you think I should see a doctor again?