Cramping?

Blair

I’m only 3 weeks, 6 days pregnant, so it’s super early. I’m having cramps though. Nothing sharp or specific, but general cramping in my lower abdomen. Did anyone else have cramping this early? I’m terrified my body will reject this little fertilized egg 😞 My HCG is doubling, and yesterday I was at 338. I’d love your insight! Thanks!