I got the shot in my left arm and hardly felt it. For the rest of the day it felt a little bit itchy and slight burning sensation around injection site, then the next day slightly sore like I had been bit or stung by a bee if I tried to lay on that side. When I laid on my back or the other side it's like I never got a shot at all. Here it is 3 days later and I still feel great. I feel kind of silly now for taking so long to get my shot.