so for the past week ive noticed when im in traffic or whne i have the ac on my temp goes up pretty quick. i also noticed that my radiator fluid disappears slowly but i always keep it topped off. when i turn off my car i smell radiator fluid and also when i give it gas around 1,000 - 1,500 rpm the throttle is really jittery. i dunno if its the head gasket or not because the radiator fluid isnt brownish and the oil isnt milky. so im tryin to narrow it down to what it is. help!