Actually, more than likely what you're "perceiving" as sourness is not from sanitiation issues or anything of the sort. What you are experiencing is "carbolic bite," Co2 "tang." At 9 days your beer isn't carbed yet. Co2 is still being produced and that co2 isn't fully in solution yet. You're tasting and smelling stray co2, nothing else. And many folks perceive co2 bite as "sourness."
I know you want to start drinking your beer, but most of the time normal, average gravity beers take a MINIMUM of 3 weeks at 70 degrees for a beer to full carb up, and possibly condition as well. Though many beers take longer for both to occur.
Additionally a good period in the fridge AFTER the beer is carbed helps fully seat the co2 in the beer. Right now it's too soon.
Check back in a couple more weeks, and more than likely everything will be fine.
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