I know if I were you I wouldn't be able to take this advice-but freaking out is only making it worse. You need to find a way to relax yourself, perhaps a hot bath to calm your stomach down? I know that helps me when I'm feeling crampy in my abdomen! From experience, anxiety can absolutely cause you to feel that sick-I have had anxiety attacks that have caused me to get what I feel like is incredibly close to having to v*, but I never did! Just try your best to calm yourself down and take your mind off how you're feeling.