AF 4 days late

Lauren • 23 & 27. PCOS and TTC naturally as of Nov 2016 - thus far with no success.
PCOS and 6 months TTC - I've been taking OPK (sporadically) for around a month. All negative (or what I am perceiving as negative. 3 days worth of 2 lines - the control line red and bold as usual and a relatively faint 2nd line?) I have had serious indigestion and bloating for the last 3 days as well as clear discharge and a slightly upset tummy. AF was meant to arrive Sunday, negative pregnancy test Monday it's now Thursday and still a no show! What do you think ladies? Is this our month?