2011 over heating

[Wdverdegem]

My 2011 is overheating. I blew the head gaskets once studded it egr delete all that stuff. Well 2 weeks ago it over heated. I pulled over cut the center out of the thermostat got it home put a new one in.... well now in the am or when it's been started after cooling off it gets hot then after that I could drive it California and back and it runs normal temp. Could someone help me. Could it be another headgasket or something else thanks