I hope it went well. However if it did not, don't hang everything on the outcome of this particular interview – its not the end point of anything at all, its just a stage of your existence. In 10 years time, this difficult stage of your life will not matter to you in the least when you look back, as all sorts of other things will have happened in your world – and this year of time you struggle with now will be put much more into perspective and proportion.
Don't hang all your self esteem on work – its what you do, not who you are as a decent, valuable and nice person. Having a bad time in life does not make you a lesser person in any way. Be proud of how well you have coped so far, praise yourself for surviving well, when the odds at the moment feel against you.
If you find you are getting bogged down in a mire, remember it is a stage you are passing through. Maybe consider asking your doc to refer you to councelling sessions so that someone neutral can help you see this is a moment in time you are travelling through and no way is it where you will end up forever. If you can hold on to seeing beyond the immediate, you will be fine in the longer run.