OPK question

Mary • 37 yrs old and just gave birth to my rainbow baby 2/22/17 after having had 6 losses and I'm expecting again on 2/9/18
i used my 2 morning urine(because i forgot to do the first) but waited 4hrs. Af ended yesterday and im on a consistent 29 day cycle. I know the test is negative but the lines are so close in color. if the test line doesnt get darker over the next few days, does this possibly mean i ovulate while on af?