I had sex 3 days before my due peroid, it is now 2 weeks late, I have sore boobs which I never get and cramps and back pain but no sign of peroid and had negative tests could it be too early, i have a two year old already and I've noticed I have the same fragile feeling in my tummy as I did when I was pregnant with him, WE have been trying for another baby for wee wile