Paranoid over room temperature and temperature of baby

Hi mommies, I am a first time mom and I am constantly worried about my baby core temperature rising due to the temperature of the room. Will overheating cause brain damage like how fever should not go above 40 degree Celsius? When I touch my baby, he feels warm not hot.. and a little sweat in his neck fold but not at the back of the neck. When i on 24 degrees Celsius , he will sneeze.. but when I woke up at 26 degree myself, I feel warmth .. may I know what temperature do you all on for room? I am really worried for my infant as I know of young adults whom have fever above 40 when they were a child and their intellectual stopped at that age despite they body continue growing .. #adviceplease #firsttimemom #FTM #baby #newmom