Changing Spark Plugs... oh crap

[rustynail21]

Was changing spark plugs on my 2005 X5 today. All is good, on the third plug on the driver side. Think I've back the plug out, but it tightens again and I cant get the socket out? So I'm trying wobbles, needle noses, etc. Grab the wife's little compact mirror and boom... coolant has filled the spark plug hole.

I have no idea if I loosened the plug or not, although I saw the plug (without the socket around it?) at the bottom of the hole before the coolant got cloudy from me confirming with my dirty fingers.

What did I do? Did I crack the head? Did I break the valve cover? Is there coolant in the valve cover?

Any help would be appreciated!!!!