I know this is so hard but take it one day, one hour even at a time. We all understand here what you are going through so you are not alone.
Take some deep breaths... you will be ok I promise.
This is about your husband and he needs to go through whatever he is going through. I learnt the hard way that friends, relatives etc can't help them. The WAS needs to work through it themselves. Your job is to look after you. I know you can't help but worry about him and think about him and that is ok but you need to make sure you eat and look after yourself as you will need all your strength.
As you are snowed in today, why don't you try and watch a movie, or do some cooking or something to keep you occupied. It is better if you try not to focus on your h or the situation but if you cannot there are links to the first chapters of Michelle's books on the boards. Have a read of those.