heating issues.....

ok, so....our furnace and/or thermostat has chosen the worst possible time to have issues....i knew something was wrong when i came home wednesday from work to a warm house......we keep our house at 65 degrees when not at home...figuring that we can always throw on a sweater....and for the temp to be in the 70's was a sign....and for the temp to rise when i turned down the temp on the thermostat panel.....oops.....the guy from the heating and air group has been here twice......something about the heat pump....all i know is that the bill for all of this short-sleeve indoor balminess will be outrageous....