I have a small coolant leak somewhere and am loosing coolant. I also noticed (its winter) that I am getting vapor cloud out of my exhaust but I think that might be due to lack of smog equipment and the weather conditions.

I did a compression test and all 4 cyl came out between 160-170.

Oil is good with no milk. It was missing a lot more coolant than it should have been with no major obvious leaks(heater core leaks slightly). If it was leaking this much coolant through a head gasket it would have showed up on the compression test right?