yes your are right. blown head gasket. you got coolant in your oil.
you better get that fixed asap
when you replace your head gasket make sure you also replace your thermostat. thats most likely gone too.
and im not sure if theres anything else. if you want, when you pull off your head check it out and make sure its ok. when i over heated my engine, a chuck was missing from one of my valves.