I recommend going to the store you got the car from, and of it is to far, get friend to drive you. Don't drive your car until its been checked out!

Generally speaking, you are describing an engine that has a crankcase that can not breath.
Pressure in the crankcase is supposed to be vented into the intake by way of the PCV valve. The crankcase pulls fresh air from the air cleaner.
Cortina is not a brand sold in the US, so I don't have direct info on it.