10.8 km today

Admittedly, I am a little over confident thinking I could 3 times; a 5 km, 10km, and 15km practice and then just go do the 20 in San Fran in May. Today I did 10.8 and was sick and dizzy by the time I stopped. Nothing like a little egg on your face to make you realize this is going to be a bit more work than I thought. It will be worth it to see my friends in SF. Can't wait. But as for the last 8 km - how will I make it.