Ovulation after miscarriage?

So I miscarried on June 20th and according to glow counting my miscarriage as my period today 7/08/15 is my ovulation day ! But I've taking opks for the past 4 days and it started out with a color line then today nothing but a very faint line . am I trying to soon ? Should we wait longer? Or did my ovulation already pass ? Any advise or experience's? TTC for 1yr 1/2 .