I get the same thing but I always considered it an effect of the decently cool weather coming back instead of the heat sapping my will to live.

If they labeled it Pumpkin Pie SPICE it wouldn't make me foam at the mouth so much, but no, it's always, always, always PUMPKIN PIE and every time I fall for it and think maybe this time someone has captured the deliciousness of pie....oh crud, just cinnamon and ginger again....