To start my car wsa overheating, I noticed it was leaking antifreeze by the radiator. The car was running great at this point. So I changed the thermostat and the cracked radiator. I start the car and my waterpump starts leaking, so I changed that. My car became hard to start and when it did it was smoking for a while and then stopped smoking. I turned my heater on then off and the car shut off. It was getting pressure in the hose going to the thermostat so I bled it now there is a leak coming somewhere by the firewall that I cant see. I dont know what to do now.