How should i cure these allergic bumps on my face? (photos)

I'm 19 years old. I'm having these since last Saturday, my face was clean before that. I consulted a physician, he said it was some kind of allergy and gave me an injection and tablets. His medicine helped in minimizing the bumps only for two days. I don't even know if it's an allergy or anything else. How should i cure it? They look really bad and I'm really worried about it.

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