I used to have nausea and heart palpitations (racing heart) alot. Gravol helped with the nausea and put me to sleep. Eat crackers only, ginger pills are good and ginger tea and ginger ale. The combination of the two could be what I have which is anxiety disorder and just means you need to learn how to relax, but I would go to the doctor for the heart palpitations to make sure. Deep breathing helps racing hearts, and stay away from caffeine.

I hope you feel better. I ask the same question about why do people get sick because my mom is battling cancer right now and I know little kids who are too. But I believe these adversities make us stronger. Take care :)