It'll be a miracle today if I get any quiet time at work today.
On to my 4th coffee now, I could make it to 5 today the rate I'm going!
Looking forward to the end of the day and pondering if I should go get some more groceries or just go straight home and worry about it later in the week.
I've definitely has cases in the past when I've had brewed coffees and lattes with extra shots give me the shakes and a buzz , that's usually the time when I recognise that I've had enough real coffee for the day.
I've done that too. Also got quite nauseous and felt generally unwell. I was about to go to the doctor when I realised what the cause was, I've been careful to limit my caffeine intake ever since.