power steering fluid is foamy on 2007 Chevrolet Impala

had a slow leak, added fluid myself hoping to delay mechanic visit. now fluid is foamy. headed to dealer tomorrow. any input?

Air is getting into the system from somewhere on the suction side of the pump --hose o-ring/seal from reservoir maybe?
1 more answer , 1 more comment
Power steering fluid usually will look foamy when engine is running and will take a bit to settle down. What does fluid look like after car has been off for 15 minutes?
Looks settled, thanks, will get a better look in the am. Thanks!