I'm 27 weeks and feel shaky, chilled, and dizzy this morning with kind of an upset stomach. The more I think of it the more panicky I become. Had yogurt and a granola bar and am trying to drink tons of water. Anyone else have this in the beginning of the 3rd trimester? I feel like I need to sit down because the room is kind of spinning, and afraid it's blood pressure-related? But I don't want to call my dr. for a dumb reason if it's normal. Help?