This morn I went all dizzy with cold sweats and then out the blue I was sick on the floor! I'm left with spacey head and tired. What could this be?

Multiple possibility. These symptoms could be caused by virus, low blood pressure, a syncopal event, or even neurological or cardiac causes. Seek medical attention as soon as possible only an examination and complete medical history can truly find the cause. If this happens while driving it could be dangerous, so nothing to mess around with - dont delay.