I haven't read the whole thread (too depressing) but some of the posts I have read are so shockingly ignorant that I can't not post on here. Poster after poster trotting out the slogan "if you're too ill to work, you're too ill to party". It must be so lovely to have such a clear, black and white view of the world. For many people all over the country struggling with their mental health (and in fact their physical health), a meal out might be their only contact that week or month, it may be the only thing they do that week and they then may take a week or longer to recover. After two hours they might be completely exhausted but it may have helped them stay connected to the world.
To the poster who wrote the above and qualified it by stating that some people want mental health treated the same as physical health - you are majorly misunderstanding what this means to such a comical degree that I can barely take it seriously. What it means is that people with mental health problems should be afforded the same rights as those with physical health problems, that mental health should be taken as seriously as physical health. What it doesn't mean is that the two are exactly the same and have exactly the same effects and presentations. Even physical health problems vary greatly in how they impact day to day.
I really can't bring myself to write anymore as it seems there is a massive fight for recognition of mental health and it's effects. In as ideal and compassionate world, work colleagues would be concerned and want to support you, OP, and encourage you to join them if you felt it would help. Sadly that compassionate world is a long way off and so, for your own sake, I wouldn't go.
I imagine that OP has most likely gone now but if not I hope you feel better soon and know there really are people who understand, who know that just because you can do something one day for an hour doesn't mean you can go straight back to work and that slogans such as "if you're too sick to work, you're too sick to party" are not only mind blowingly ignorant, they perpetuate an uncaring and unempathetic society. 