ovulation test questions

Tam
Anyone please I had a preido on the 4may-8june which is a 35day cycle I should of started  ovulation test today but my doctor said 14-15 CD which I'm sure I got a positive on CD16 and didnt BD but I took other ovulation test CD 17 and BD that afternoon I Didn't BD CD18 but I plan to tonight I'm guessing I missed my chance?