I am four days late. I feel pregnant. I know that sounds crazy, but I feel this light nauseum all day, I want to take a nap as soon as I get home from work, my boobs are sore, have been for a week and a half now. I took a test yesterday morning and it was negative. I just don't get it. My breasts are tender and feel "full", heavier. Its the craziest thing. And smell. My sense of smell seems hightened, and if I smell gas or smoke on a smoker, it makes me sick. What else could it be?