shouldn't i be tired?

i mean, in the past 6 days:
i moved an entire office in boxes for 4 days. i played with crazy cute children. i stayed up late talking. i did p90x (okay i finally had to skip a couple days, but i made up for it.) i went to the MIL's and got a migraine from the dog. i stood and baked, filled & frosted 300 cupcakes. i cut & washed piles of fruit. i worked 5 hours every day. i clean up a wedding reception. i washed dishes. i carried around a 16.5 pound baby. i stood for an hour helping teenage girls do baptisms. i even got like 5 hours of sleep every night for the past week. head, back, feet- all in uproar. i feel like i piled on the ingredients for a much needed slumber.
so i beg the question... WHY CAN'T I SLEEP??