cant understand what is happening to me

hey good news is that it looks like I will pass my class if all goes as planned, praise God! The bad news is I have reached that level of exhaustion where your body starts going whacky. Things I am noticing...I am super sensitive to smells! Right now the smell of my cooking is making me feel sick (and it tasted good). Yesterday, I had to put my scented candle in a drawer because it was giving me a headache. My stomach refuses to digest things. I have lost my appetite, but need to eat to stay awake. I don't want to do anything and I don't want to do nothing either! I want to exercise, but I don't. I want to swim, but I don't, I want to watch a movie, but I don't, I want to eat, but I don't. You get the idea. I'm all uncomfortable in my own skin. I feel restless, I know it is because I am stressed from just being tired for too long, but now I don't even feel sleepy anymore. My body is just confused! It doesn't know if it is hungry or full, sleepy or awake, it just is giving me mixed messages! I am looking forward to sleeping tonight and just getting up whenever! I'm sure tomorrow I will feel much better!