You say you ve had a complete cardiac workup to evaluate your symptoms. You don t say if you are still menstruating or not, or having any change in the regularity of your menstrual pattern. The symptoms of burning skin, palpitations, and insomnia certainly CAN be symptoms of peri-menopause, which is a strong possibility in a 44 year old woman. Your primary doctor or gynecologist should send your blood for what I call a Lady Hormone Panel, which checks to see if the LH (Leuteinizing Hormone) and FSH (Follicle Stimulating Hormone) levels are abnormally high, and checks the Estrogen and Progesterone levels. Sometimes, the Anti-Muellerian Hormone level is checked also. These can tell at what point in the monthly menstrual cycle you are in, and whether or not you are close to menopause. All 3 symptoms you described can occur in peri-menopause or the change of life, as it is sometimes called. There are herbal and/or pharmaceutical medicines that can be used to help settle down the sometimes-disturbing symptoms of peri-menopause. The burning skin you refer to is sometimes described as a hot flash or flushing. Good luck. Let us know how things work out for you.