2000fbp,
If you are concerned about a possible head gasket leak, I'd suggest getting an oil analysis done on a sample of your oil by a place such as Blackstone Labs. If it is going to pop, better to know sooner rather than later.
But yes, most of the cars I've seen with a head gasket on the way out had all kinds of crap in the coolant and an equally nasty foamy substance in the oil.
Bogatyr