What is this feeling of doom?

And so the holiday is almost at an end. I am clinging to the entrails of the holiday like rock-climber who has slipped off a precipice and is mustering up the last of their strength as they hang over a chasm.

But why, oh why, does it feel like this? I feel utterly wretched and doom-ridden.  My job is fine. I like my colleagues, generally like a lot of the children, like what I do, have a safe comfortable environment to work in.  I just have a very long commute as the only real negative.
And yet this ending of the Christmas beak feels like the end of the world.  I feel so gloomy and despondent over how I have used my holiday, regretting the work I have failed to do, the friends I failed to see, the tasks I meant to achieve. In my rational head, I know this is silly, that people work in treacherous conditions, some get only 20days of holiday a year (if that) and they have to juggle childcare, elderly relatives, other responsibilities and the suchlike.  I have none of that.  I KNOW it will be fine once I am back but just for now I am wallowing in a well of self-pity.  Woe is me! Silly, isn't it?!

Please tell me that other people feel this sense of doom upon returning to work, especially after Christmas and I am not some lonesome first-world problems brat (well I am that, but it would be nice to know it wasn't just me!)

I shall, of course, make sure I do some blessing counting to assuage these silly feelings, but in the meantime, goodnight!

xx