I got my first ppaf 11 days ago. Emma is almost 9 months. I knew something was up because mid-April, I had a cramp on one side and I cramped a bit before I started. Once I started, I didn't have cramps. AF was a doozer for the first 2 days. Maybe this is TMI, but I was soaking through a tampon every hour. I ruined several pairs of perfectly good undies. My midwife was a bit concerned about the amount of bleeding, but it started to slow down on the evening of the 2nd day.
Good luck to you!!