That can really be scary! It can be much more difficult to breathe when the air is that cold, too. I found my old scarf and tied it around my face when I went outside to feed the birds, take out garbage, etc.. Though I hate the feeling of it over my mouth, it did help (well, a tiny bit, anyway)!
Hope you are much warmer now--stay safe in the frigid air! (Aren't we all hoping it's gone for this year--at least the worst of the cold??)
"If you are what you should be, you will set the whole world ablaze!"
St. Catherine of Siena