please help

I had ovarian cyst on my right ovary and it is removed along with ovary 5 years back as it is borderline tumor....i had baby with one ovary.... Now I got cyst in left ovary... And is is removed by laproscopic surgery 2 months back... Now I am on ttc 2...i really hoping this month... I took test today but it came bfn.... I am in CD 35... I didn't check my ovulation day... According to app, it's on July 17th...how early can I again test if I didn't get my periods??? This wait is too painful.... I feeling little pain lower abdomen and my cm is always wetty....