Ok so yesterday I shot some dope (about .4 -.5 of a gram) in my arm and about 2 minutes later I began to have serious swelling in my bicep region, around my chest and neck a little, and my FACE! For FUcks SAKE! I've been using this same dope for a week and have had no previous negative reactions, but for some reason when I shot my the last of it I had a terrible reaction. I mean my FACE was so swollen around my cheeks and eyes and around my ears a little too... VERY scary experience, Can anyone offer any insight into why this might have happened? Or has anyone else had a similar experience? Any advice will be appreciated! Thanks in advance for your replies!