Period?

I've never had this happen. I'm supposed to get my period in 4days and by now usually I start cramping and feeling really sick and nauseous. No cramping but I'm nauseous. I haven't really started bloating yet like usual. And this morning I sneezed and had the sharpest pain right across my lower abdomen kinda right about my pelvic bone. (I wanted to cry and I have a pretty good pain tolerance.) That was a new feeling for sure. And it's happening every time I sneeze now. Could it just be new signs that my period is coming?