Cm before period i need help!!

Hey ladies do any of u get milky cm wen wiping before period i was suppose to start monday im 15dpo today and nothing yet just cm wen wiping ..i got a pos opk this month but feeling like i didnt ovulate maybe thats why im late or delayed maybe ..i felt like it was coming yesterday so i cried and put a pad on and nothing yet ..my breast are lightly tender and it started yesterday