Hips widening?! 13 dpo

Hi ladies, I am 13 dpo (got a bfn), but my husband pointed out that hips have gotten wider. I am a very small frame, so it is easy to see any change in my body shape. Has anyone else experienced this? I also had cramping last weekend and then again yesterday - af is due tomorrow (glow), 10/11 (ovia), and 10/7 (ff). No spotting, but I did have mold cramping during ovulation.