Is there a chance you are experiencing early-onset menopause?
Hot & cold chills are a big symptom of menopause.
Hello~It could be related to hormones, such as peri-menopause, I would see a gyn and ask for some tests to determine what is going on with your estrogen, progesterone and testosterone levels. At your age, the hormones start to fluctuate quite often and they can cause very uncomfortable symptoms.