Hiyya,
I have been in some pretty bad places and had some bad stuff happen. You may be interested to know that multiple layers of damp cloths are quite warm even in the sub zero. I found that if you exert yourself you can generate enough heat to start a kind of steam heat process happening. It's not ideal and you do prune up and get trench foot in just one full day. I'm just talking about survival here so going forward keep a camping "go bag". It should be water tight, puncture resistant, and contain emergency supplies. My guideline is that if I'm wet, cold, thirsty, hungry, lost, injured, and faced with 10 minutes to prepare for a bear attack it had better be in the bag.