Don't know what's wrong with me, but for the last 2 days I've been very tired and achy with a blinding headache. No cold symptoms.
The next 3 days are absolutely crucial for my employer and I play a crucial part in what's required. Probably the most important thing in the last 3 years. We're a very small company there's not anyone else who could do it.
They're not great employers and I have actually already resigned, but I also have a degree of professional pride, and I really would be leaving them in the lurch.
Otoh, they really will tell me if I go in and they think I'm not up to scratch!
I am unwell, but if I was enjoying work more I'd probably make myself get on with it.