Just wondering if anyone could offer some advice...

Me and DH have been TTC for the past 4 months, i am now at 44 days from my last period and still no sign. For the last 6 months my period has been late between 3-5 days each month. I have taken many HPT's but all been BFN. I have had cramping like as if AF is on her way and also had milky/white discharge the last few days. What does this all mean?!?