Trying not to get too excited

My period is supposed to start in four days. Hubby and I bd'ed the day I had clear, stretchy discharge (14 days before my period) and two days after that. I have had horrible nausea today...to the point I've barely been able to eat and was only able to drink half a cup of coffee this morning (usually I drink four). I don't have a fever, and I haven't had my usual PMS symptoms. No major cramping, headaches, Breast tenderness, etc. usually my breasts are killing me before my period. They are, however, fuller and I've been having vivid dreams. Gah...I don't want to get my hopes up, but these are good signs, right??