Empty tank

I've reached the stage where I have nothing left. Nothing left to give anyone, at home or at work. Nothing left for me. 

I'm snapping at the kids. I'm short with the husband. My kid just answered me back and I started to cry. "Why do you ALWAYS cry, about EVERYTHING?"

It's got to the point where I am. I never used to, I never had any emotion about anything, but now I do. 

Bollocks. 

I'm off work. Because I'm dizzy. BP is fine, ECG is fine, no earache, headache or anything like that. 

I just feel like I've had 10 pints. Sadly I haven't. I also feel sick. 

Sick of everything.