Nova Scotia here, not even close. Not even the space heater.
I love the challenge of keeping our heating costs down. No one seems to mind and dd runs very hot. I'm the cold one and I'm home alone all day working, so mostly it's my call.
We did all the caulking and insulating possible last year, including insulating the walls of the entire house.
I bought an oil-filled space heater.
I bought cheap down vests for us all to wear inside the house. They're light and snuggly and everyone loves them.
I am hiring a seamstress friend to make heavy drapes and draft-stoppers for the old windows. We will not replace the windows as long as they're in such good shape, on the advice of the energy-assessment guy. I think the drapes will help a lot.
We are looking into an insert for the fireplace, or possibly a woodstove with a cooktop; unless we need the chimney for solar purposes.
I have heard that using an electric blanket/pad to preheat the bed can save a ton of energy at night. Anyone try this? Do you think it's safe?
Next stop: Solar roof tiles next year.
But absolutely NOT to the heater, not yet! We have other ways to deal with the cold.