You should be better by now, at least noticeably, if not all the way. You should call the doctor and tell him that the injection and medication didn't work. You aren't having any trouble breathing or anything like that, right? What about itching?
Has this every happened before? Are you allergic to any foods or anything like that? Have you eaten anything new recently or something that you've eaten before, but not for a while, like peanuts, tree nuts, shell fish, regular fish, strawberries, anything?
Are you on any medication (besides what the doctor gave you for this problem)? Is it new or old?
As for the face wash and soap, you need to check labels and find one that says "hypoallergenic." Ones that say "for sensitive skin" or "gentle" aren't good enough. It must be hypoallergenic. If you have issues with acne, make sure it also says "non-comedogenic" or "won't clog pores." Follow the same guidelines with lotions. There is a good oatmeal-based lotion (brand name) that moisturizes very well and is hypoallergenic. If you don't know which one I mean, message me and I'll tell you. (I can't say it or I'd be tagged for advertising).
Good luck. I think you should still call the doctor and ask what to do now, since it isn't getting better. If this becomes an on-going problem, you should probably see an allergist.