Yesterday, I started feeling really ill. My skin ached everywhere, I couldn't eat, I felt sick all the time and my head was pounding. today I feel better, but I still feel extremely sick but not like the type when you know that you are going to be sick, I just feel sick. I also stand up and my head throbs, almost like someone is digging into the back of my head with a knife and I feel awful, all dizzy and weird when I stand. I ate and drank quite a lot but I've never felt like this before.