High temperature readings :(

:
2008.5 MGM Mazdaspeed3
noticed today that my engine temp gauge was higher than normal even when i was driving conservatively. later in the day, after driving again i noticed it was getting dangerously close to HIGH, like 2 or 3 nocks close so i pulled over to let her cool and the fan was running high as well.

got an appointment with the dealership tomorrow. still under warranty. im gonna have to slowly drive and continue to stop and cool on my way since its a long drive and after only 5 minutes of driving the tach creeps up to scary levels.

any ideas? im assuming its a problem with the thermostat not allowing the coolant to cool the engine. also my ac is just blowing hot air and im assuming this is related for sure.
 

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