Your just fine, drive that baby and check back after another 100 miles. Its common for these engines to develop condensation in the block when running short drives around town. Watching this thread and seeing that its clearing up I say your ok.
When my head gasket blew I lost all the antifreeze from the reservoir, had milky cap and dip stick...really really milky, developed high pressure in the reservoir and over heated. It was obvious. You'll be just fine and here is a learning experience...if it is a blown head gasket and your not driving it daily dont let it sit. This is my engine after 6 days of sitting.

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