Last cycle I had cramping 3 DPO that lasted a couple of days and thought it strange too. But didn't eventuate to anything. Had a quite heavy AF but only lasted 2 days. Every month seems different for me. I can't work me out either. I'm trying to stop reading something into everything, but it never works. There is always something that I use to convince myself that this cycle is the one. I hope it really does mean something positive for you.