My period is due any day now and I have been having some on an off cramping and today I've had some pretty consistent cramping which leads me to believe my period is coming. Anyways, there's been a couple days that I've woken up and smelled pure TAR. This morning the stench was so strong, and I kept asking my husband if he smelled it too. He thought I was crazy and said he didn't smell anything. I've also been having some headaches and lightheadedness as well. Is this a sign of pregnancy at all?