For the pass two months my period have been coming earlier by 2-3 days. But my period only lasts for 3 days max. I am still having cramps in my lower back. My stomach feels hard in one spot. I'm not vomiting but I am having stomach aches. I have been very emotionally and afraid to know if I am or could be pregnant. Can someone please help me?

I suggest calling your doctor. This could be the result of pregnancy (have you tested?) or other issues such as diet change, hormonal imbalance, stress, cysts, etc. This list of possibilities is a long one.

It could be that you are pregnant or it could be something else. I would take a Hpt see the result and then consult your doctor to identify the route cause x