I was suppose to start my period 1/29/16 but it didn't come. The day before Yesterday I had drank a spark and I hadn't had much to eat...an hr later I started throwing up since then I have been nauseated, frequent headaches, and just feel yucky. I feel like I'm going to start but I haven't. I have had slight cramping but nothing painful. Could I be pregnant or maybe just a little late ?.....opinions?