I have been taking Savella for just over 2 weeks for fibermyalgia. After 6 days on 50 mg. I am having headaches, nausea, lack of appetite, fatigue and weight loss, and loose bowels. About the same time, I noticed the fibermyalgia pain had lessened. I have 13 days left, and am wondering if I should continue it, or stop it? Thank you for your advice.