Ovulation confusion/panic! need advice

I have a consistant 28 to 30 day cycle. I am currently on cd 20 and havent gotten an obvious positive twice this month i recieved 2 decently dark opk tests but no where near positive. It is my first time using them but i have been actively ttc for about 1 year now but stopped using protection 2 years ago. My so had his spirm tested and everything is normal, i also had my hormones tested and again everything is normal. I really dont know what to think. Oh and i started testing on cd9. Does anyone have any idea what could be happening or experiences like this.