I agree with both responses.Look at the dipstick and drain the crankcase, if the oil is also milky I would suspect the head gasket.I believe you would also detect an anti freeze odor coming out of the exhaust if the head gasket were in need of replacement as well as periodicaly having to top off the radiator expansion tank. Tell your neighbors that you are not trying to commit suicide when they see you with your head at the exhaust pipe. Good luck!