Irregular cycle, when to test???

Amanda
We are on month 6 of TTC. My cycles have not been regular since stopping BC in October- I have endometriosis. The past couple cycles had been shrinking closer to my usual length (33ish days). But now I am on day 49 and (I think) AF was due either 9 or 2 days ago (according to separate cycle trackers and ovulation tests....) either way, still no AF and still no positive test. How do my fellow irregular cyclers figure out their BDing and pregnancy testing???