Not sure ER: I'm not sure the ER is the exact right place for you unless you are completely unable to walk on that leg.I like to save the ER for actual emergencies.I would certainly advise trying to see your doc first thing Monday however, or you could even try Urgent Care where you could get an X-ray of your knee and see if there's an abnormality that could be affecting a nerve behind your knee.Best of luck
Answered 5/18/2015
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