Hi, I am a 40 year old stay at home mother of two. I am currently training for a half marathon after taking a 4 month break. I have been running for about 14 years. On paper I am very healthy... low blood pressure, low cholesterol, good all around numbers. Lately though I ve been experiencing heart palpitations at night, anxiety, paranoia at times. Its worse on days when my fat intake for the day is not high enough. Am I experiencing some sort of fat deficiency? To remedy the symptoms during the night I have to drink some milk, have some crackers with peanut butter, something with fat or else I can not fall asleep. Please advise!