Scarlett, if you are too tired and cold to get up and eat, it sounds, IMHO, like something is wrong.

That would really worry me. I live in an old house just north of you (at the bottom of NY state) and we have similar weather of late. But I've
never been too cold or tired to eat...and neither has my husband, who's very skinny and has no problem just going to bed when he's tired
and hungry at the same time. Honestly, have you considered seeing a doctor?
Being excessively cold and tired can be signs of a thyroid problem. My best friend has a really bad thyroid disorder but it wasn't diagnosed until she was 32! She lives in CA but was cold all the time. Still, none of us ever thought to ask her if she'd had her thyroid checked. When a routine blood test for another issue she had came back with a diagnosis involving her thyroid, it made perfect sense--she had all the symptoms. Since then I don't hesitate to ask people if they've had their thyroid checked.
However, like you suggested, eating more SBD foods is a good idea, overall. Are you eating good fats every day? You should be. Your body needs fat to be healthy--your brain especially needs it. You might consider adding some Omega-3-healthy fish to your weekly diet.
You might also want to consider putting your daily food into Fitday to see how many calories you're getting. If you aren't getting enough, not only will you see a cessation in weight loss, but it's really unhealthy. Make sure you're getting at LEAST 1200 cals/day.
Hope you're feeling better all around very soon!