I was answering unanswered questions and did not notice that you put this under MS community. It still doesn't make sense to me that you had chills, but you might want to call your primary care doc before calling an ambulance.
You need to see a doctor. I can't tell if you are experience effects of diabetes or blood clot or pinched nerve or a stroke, but you need to call an ambulance to get you. If you just have somebody drive you to the hospital, you will be stuck in the ER for hours. If you go by ambulance, you go to the front of the line. This sounds serious, like stroke or blood clot or infection.