Constant hunger, nauseous, and constant headache. could i be pregnant?

Lately the right side of my stomach and back have been achey. I've been very hungry, sick to my stomach, hiccups all the time,and I've had a head ache. I have also been sleepy and had an unusually short period last month (mine last 8-14 days). I have cold symptoms and diareah. I'm not worried about being pregnant. It would actually make me very happy! I know I will take a test soon. I have just not been feeling well lately.