Overheating

Two months ago my car was overheating. I was told my radiator was cracked. I had it replaced along with a new cap. About a week later I would drive my car and when turned off I would hear a bubbling noise and coolant would pour out of the overflow tank. It was not consistent when doing that. I was told my thermostat was sticking. I replaced it. It is still doing the gurgling and coolant comes out the overflow. It has not been overheating though. Today, it did overheat. When I popped my hood to put coolant in, I noticed my overflow tank is full to the top but there was no coolant in the radiator. I had a mechanic do a pressure check and said it was fine. Yesterday my son in law bled my radiator and let out some coolant because a mechanic that looked at it said that was the problem. I feel lost.