I am having a reaction to the flu shot and what if anything should I do about it.?

So I was at the doctors yesterday and had the flu shot. I just looked at in the mirror and I can see where the injection went in and there is a red swelling going out from the center. The redness is the size of a baseball. Should I do anything about it
Update: I am allergic to eggs. nothing official but every time I eat eggs(at least in the past, do not eat them anymore)I always have a hard time swallowing.
Update 2: Totally agree they did not do there job properly someone should have asked me if I was allergic to eggs before giving me the injection.
Update 3: It is starting to get better already. I circled the red spot on my arm and it has already shrunk
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