Sounds rather like me ,,,, although I had to go to the doctors this morning in freezing cold weather. Also joined the queue in the post office. Very tiring! Never heard of that word for following before but I should have said 8 letters in total!
Chelle have you got 5957 in front of you? I ask because I can't fit seriatim in to suit either 18D nor 15D. They are my last 2 not completed. I seem to be particularly dense today !