late ovilation

Ok so AF started in the 12th I have a 5 day run...typically comes every 31-32 days. I am current on cycle day 19, I've been taking OPKs since the 14th all negative....its getting darker officially today but still no surge....i do however have cloudy stretchy CM, thinking it will be clear tomorrow. My question is how many of you have ovulated late and actually concieved, and how many dpo did it take to get a bfp? Update: tried that for about 6 almost 7 years with so many procedures test I lost count...i have unexplained infertility.....no luck I need to be specific