more than likily a coolant issue if you just touched your coolant.. Just open the radiator lid, run the car till the fan comes on (your thermostat should be now open).. you will hopefully see some bubbles:thumbsup:
air pockets in radiator = effecting Idle control valve (theres coolant cooling) = idle hunting
blown head gasket (Also white smoke when driven hard) = coolant pressure leak = effecting Idle control valve (theres coolant cooling) = idle hunting

