Could it be that an artery has been blocked or obstructed w/ fillers? Will it cause skin necrosis? Am I just paranoid? (photo)

12 days ago I had a session of a permanent filler injected into my nose.The Doctor is very famous, talks on the tv and has done this successfully in thousands of cases. Aside from a mild pain and discomfort on the first days, everything was perfect. But now Im having this constant throbbing sensation on the left side of my nose. My nose apparently looks perfect, no swelling, no bleaching, no color Change, apparently everything is fine... . Please Help me.

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