If the vehicle isn't overheating you probably just have a coolant leak somewhere. If left unattended however, your vehicle could run out of coolant and subsequently overheat. Overheating can lead to extensive engine damage, so I recommend addressing this issue...
One of the first things that should be checked when dealing with a serpentine belt that has come off would be to check that all of the pulleys that are used for power steering, water pump, idler pulleys, alternator, crankshaft,...
Based upon your description, it appears you have a refrigerant leak. If you have inserted refrigerant that has 'UV Dye' included, detecting the leak is helpful with a 'UV light'. There are four major components linked together with hoses and...
I would first retrieve the trouble codes, to see if that can shed some light on what the issue may be. If this problem occurred only after you filled up, then it may possibly be a problem with the type...