A little help?

I was wondering if anyone has ever felt this.. I was due on last Saturday and my period normally lasts 3-4 days at the most which I'm very lucky! Which means it would have ended yesterday, yet no sign? I have very sore nipples without sounding crude, and when I wake up I don't feel sick but after an hour or two of coming round I feel quiet sick, it's more where you burp and taste sick I think I'm to stubborn to be sick anywhere! I feel heavy in the stomache and he bottom of my stomache is very hard! I don't know weather it means I'll be coming on or?? Anyone felt like this?? I have been trying but we haven't been trying very long! Any advice be brilliant!