Ovulation tests driving me crazy

My ovulation day is predicted to be on 7/14. On 7/7 I did two digitals at the same time with different results. Started the line tests but Ive been getting with the line REFRESSING. WTH . My menstrual cycle days were form 6/27-7/3. Also on Letrozole for this cycle. TTC ☹️☹️☹️☹️