you must be so frustrated at ttc for so long but all I can see is good news that there's nothing wrong! that's great!
I got my bfp after 17 months of ttc (all tests were fine) and I can honestly say the month I chilled out about it, didn't count cycle days, didn't look out for ov was when it happened!
I do hope you get your bfp soon as I know what a hard, emotional journey it is!
good luck xx