Why am I having cold sweats all the time.?

My doctors just put me of this medication called metaformin. It is for people with high blood sugar. Along with that medication I also take a one a day vitamin, a dietary supplement called ultra rez v, and zoloft. I just started taking all these. I didn't read anything about me not taking these kind of medications together. But any ways I have been sweating like crazy non stop all day and night. It doesnt matter if I am relaxing or not. A lot of times I will get chills through out my body. Does anyone know what could be cauing this???