White smoke from exhaust, now won't start
 

Hello! So about a week ago my 2010 mini cooper was leaking coolant. Took it into the shop to find out i had a cracked thermostat. I had that replaced and had am oil change done. This was done last Wednesday (7/27). Yesterday, I had my car sitting on in a parking for about 15 minutes. When I pulled away an abundance of white smoke came out of my exhaust along with a weird smell, smelled kind of like a stink bug. I parked it and left it for the night. Tried to leave this morning and now my car won't even start. Just a faint sound from the engine. This not apparent leaking fluids and my coolant levels are normal. What could this be?