32 TTC since June 2018

I will be 33 next month and my hubby and I have been ttc since june 2018. Ive been lightly working out, changed my calorie intake and even been taking prenatal vitamins for months.Every month i test with ovulation strips, my periods are regular and I get a positive ov strip test every month. We are very conscious of my fertility window and week. I got some test done for PCOS and endometriosis and tested negative for both. HELP what are we doing wrong?! Due for af on tueday and def feel its coming 🙄