My car is burning antifreeze but nothing is on on the ground. I have to add coolant at least once a week because it keep saying check coolant level. Is it possible I need to replace the radiator top because of evacuation? I have a new water pump and thermostat. Please assist if possible.

I'm sorry I forgot to mention I had a pressure test performed and nothing wrong showed during the test. I've also had my oil ring and gaskets recently replaced because of white exhaust smoke.