I'm a weird case. Anyone else?

Emily
I've  had post-ovulation/pre-period spotting for several months with all BFNs (normally starts cycle 21). That is the only thing wrong with my cycle. It may possibly be luteral phase defect but no tests have confirmed that. 
I'm currently on my second round of letrozole (we've been trying for about a year). 
Anyways. I'm day 22 and no sign of any spotting. Which is highly irregular. I realize a lot of people look for spotting thinking it may be implantation spotting but perhaps the lack of spotting for me may mean pregnancy
Has anyone dealt with anything like this?

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