2 days diarrhea, now shaking and nausea.

Two days ago, I suddenly (around 3am) awoke to bad cramps, and proceeded from there on, until yesterday with constant diarrhea (after everything i consumed: drink and food) feeling out of it, and hot with chills. At first, i thought it was food poisoning because today, there were no onset symptoms, nothing. Just about an hour ago, I began to feel a fullness and subtle pain in the middle of my stomach, a middle ground between wanting to poop and wanting to throw up, neither has happened, I just feel a tad confused, dizzy, and extremely nauseous. I'm unsure what this is, as I have noticed a loss of appetite, and days leading up to feeling sick, I had headaches consecutively on the right side of my head, by my temple. I dont know if this is a stomach bug, or my body still getting rid of a bad dinner. (I ate soup two days ago, that I thought caused this, but by this point, bad dinner should be gone by now)