Is there white smoke coming out of your exhaust?
does your oil look like chocolate milk, and is it over filled?
do you have un-even cylinder pressure. (135 / 135 / 50 / 65 )
if you have a headgasket leak, those are three dead give-aways.
you might have something like a leaky hose, or a radiator cap could be plugged.. I had an issue where my aluminum radiator corroded inside, and clogged the overflow nipple, causing my system to pressurize much more than it is supposed to. it blew every single heater hose on the car.
When you say you seen coolant on the head above the waterpump, if you have a leaking hose, the fan blows the coolant TOWARDS the engine, so a leak may look like coolant is coming from the head...
that area you are talking about is the timing cover right? (front of the engine, directly beneath the valve cover) ... no coolant flows in / through that area...
get to your local parts store, and do a coolant pressure test... that will find where your leak is.