Hi, I Am About To Have My Fourth Depo Provera

Hi, I am about to have my fourth depo provera shot today and am just a little worried. Last shot I had I had my partner drive me to the city and we had to pull over as I was violently ill and had to rest in bed for a few hours. I am having my shot at 12.45 and I start work at 4.45 and am worried that I may experience the same problems. I have had no other side effects besides a bit of spotting here and there. Just the few days after the injection I get a bit nauseous but last time was the worst. I cannot normally vomit without forcing it to even when I had gastro I had to force myself to vomit. But this made me break out in a cold sweat and projectile vomit out of the car. Is this normal?