Yes. Feeling hot, sweating, clammy, or cold, is very normal. When you body is in a stressed state it reserves energy for you brain. So you may feel colder fingers or feet as your body is shifting from burning carbs to fat. If you are feeling hot or sweaty, it’s a sign that your body is currently burning off fat. Wear light clothing to help alleviate some of the body heat. Or, add a layer of clothing if you begin to feel cold.