Looking for help bc my husband is out of town and I’m having car trouble. My 2012 citadel started smoking out of the hood yesterday morning. Earlier that morning I noticed my heater wasn’t working inside the vehicle. It seemed to be white smoke from the hood but it’s hard to say as I live in Canada and everything is white right now. We assumed it was coolant so that was filled up and the thermostat was also replaced. I took it to the gym today and no smoke but heater still not working. On the way home it started smoking again and I started hearing whah I can only describe as a flapping noise under the hood. I was just down the street from my house so I made it home. Once cooled down I checked the oil level and it is just below the lower tick, so not completely out but obviously I need oil but would this explain it all? I don’t want to fill the oil and continue to drive it and incur more damage. Any ideas??