End of the working day

Back to work today.  I finally managed to sort out the problem I thought I had with my budget - just in time for the deadline this afternoon.  Good to finally get it sorted, but still felt rather flat all day as it's my friend's last full day (it was confirmed on Friday that she is being made redundant, and she doesn't have to work her notice).  She'll be in again tomorrow, but probably not for the full day, and then that's it.  It all seems to have happened so quickly - and to be so unfair :(

I was OK most of the day, but suddenly came over completely exhausted on the train home and felt a bit shaky by the time I got in.  Think I may have worn myself out a bit over the last few days...!