I still feel ok

It's 10.15pm. I have only had two cups of tea and a biscuit since 7am. Back to back meetings, discussions, phone calls, emails since. It was going to be a nice busy week but it turned manic late on Tuesday because of a last minute call to support a proposal. Lots of missed deadlines as a result. Weekend work is a definite now. But I strangely still feel ok. Hmmm.... I do feel as if something is about to hit me though and I'm beginning to worry what that is.