Chills

Chills refers to feeling cold after an exposure to a cold environment.
The word can also refer to an episode of shivering,
accompanied by paleness and feeling cold.

Last night, I decided to sleep really early because I was unusually tired and my wife was using the computer. The usual routine is that she'll sleep early because she has work at 12 midnight, while I use the computer until around 11 PM, and then sleep because I had work at 5:30 AM. I set my alarm and slept. Less than 2 hours after, I woke up shivering. I asked my wife to turn the air-conditioner off, but I was still freezing. I put on my thickest jacket and covered myself with the thickest blanket, but I was still shaking and freezing, my jaws shivering. It was so unusual for me to feel that since I rarely feel cold all my life, even if I have a high fever. In this case, I didn't have any fever, in fact, when my wife and daughter felt my hand, it was unusually cold.

I was already thinking of going to a hospital, but we just can't afford extra expenses nowadays, and I can't afford to be absent from work since I don't have any backup yet with my client, so I just forced myself to sleep. I woke up around 11:30 PM, my wife just left for the office, and I was feeling okay. I no longer had chills, but I didn't sleep anymore. I'm now at the office, hoping that the nightmare I experienced last night will not happen again.