I would of course, consult you doctor. It may just be severe anxiety, so a daily anxiety medication may help reduce this. Unless you have a strange allergy to something in a car, thats the only other thing I could think of. Since you know you get car sick, the THOUGHT of getting in the car could bring on the sickness, this would be if you have an anxiety dissorder. Your body knows it's going to get sick and that alone stresses it out to the point where it effects you physically.
