I came down with a fever earlier in the week, followed by awful headache, hacking cough and today it has completed itself with random nausea - the kind where I didn’t trust myself to leave the work toilets and couldn’t see my clients. I gave up and came home, now flaked on the sofa. I feel terrible for leaving my team in the lurch having to cover my work at short notice, and just generally feel sorry for myself 
I had a horrible cold before Christmas which I’d only just shaken off and now this!