Pregnant? Need opinions.

Last period was August 18th. It was lighter and shorter than normal, but still a crampy period. 2 weeks later and since then I have been super moody - and super irritable...like bad! - nauseous, boobs hurt so bad I have to hold them when I go down the stairs to do laundry or even bend over to pick something up, I feel like I am starving 24/7 whether I have actually eaten or not, and Im so tired Im pretty sure I could sleep for 3 days straight. I took a test when this all started 9/1/16 but it was negative. Is this just hormones or could I be pregnant? (And yes I am sexually active...probably too much with hubby) next period due 9/15/16.