AF or IB?

Emily • 30 years old • Mommy to 3 beautiful girls and an Angel Baby • Married(02.20.16) • TTC baby #5
This is day two of spotting, it's only when I wipe. My AF is due to start 8/30, so it's a week before. My cycles have been 30/32 days. Normally when I start my AF it's brown and then the next day my flow starts, but nothing yet. It's been brown since it started except a couple times it was pinkish. Had mild cramping nothing like my AF cramping. What do you ladies think? I'm so anxious and excited. Waiting is killing me..