I would watch the food you eat. Surprisingly they can cause fatigue. I read and follow The Health Ranger, Mike Adams. Excellent for answers concerning problems like this. Many foods have contaminants that make us sick and tired. Could be lack of minerals like Magnesium /Calcium. Very informative site. His supplementreference.com has so many illness on and natural remedies plus signs/symptoms with natural remedies. Backed up by medical studies that you can find all the material for. That is what I like as a nurse. Not to go blindly into something but look at the research. Pray you find out what it is nut maybe this site can help.