My period was due about four days ago.. The week leading up to my period I am always crabby, emotional craving chocolate last week was no diffrent only my period hasn't come.. But bottom of my back is aching, weird cramp in my tummy that I keep thinking is my period starting but its just a clear discharge.. I did a tesco test on thurs and it was negative thought ok I'm just late maybe I got it wrong.. Was bugging me so I got a clear blue digital today.. Negitive again.. I don't know what is going on.. Last period started 6th of feb last had sex on the 17th of feb .. Unprotected as been trying for four years.. Anyone any ideas I don't have my hopes up just want to know what is going on with my body.. Thanks xx