AndiE you can totally get AF cramps and a BFP... I am a case in point! Apparently it's quite common. I'm 9 weeks with my first after TCC for over a year and a half and my cramps started before AF was due and lasted consistently for about 3 weeks after my BFP and still now off and on but quite dull. Initially they felt EXACTLY like my pre-AF cramps so was comforting myself and trying to prepare for AF- not knowing she would not come!