Does this happen to anyone else, and why?

[G-MAN2004]

I've been really happy the past month. Enjoyed every single day and I've had a great time. However, I've just randomly woken up not that long ago and I feel utterly sick, anxious, terrible and upset for no apparent reason. It feels like something really bad has happened and that my life has suddenly been affected in a massively negative way. My legs are like jelly right now and I genuinely feel like throwing up.

What the hell?

 

[G-MAN2004]

Never had it before and I haven't been drinking for a good few days. Felt rather crappy this morning, like trapped, but feel alright now. Very weird.

Not quite old enough for a mid life crisis.