oil in the radiator fluid
 

I have a 1999 Honda Civic CX Hatchback. My car has over 200,000 miles
on it and I haven't really had a problem with my vehicle until now.
Just before this past summer, my car started overheating. I checked the
hoses and changed the thermostat. This worked for a bit and then my car
starting over heating again. Then I was told that perhaps the
water-pump had gone out. So I took my car into a Honda dealership and
they told me that the I have a crack in my head gasket. That is why oil
is in the radiator fluid. My car is still overheating, so I drive with
the heater on full blast. Its working at keeping the temperature down,
but there is still no circulation in the engine. Is there a correlation
between the crack in the head gasket and the water pump not working?

Please help.

Thank you