Not sure where this topic would go..

How would one start to feel symptoms of pregnancy? Is now to soon? My period doesn't start for another 11 days and I'm not tripping or stressing over being pregnant. I'm just like if I am cool, if not cool, but I keep feeling nauseas and extreme fatigue and every now and then a little light headed. Is it to soon to be experiencing pregnancy symptoms or could I just be getting a flu or something?