Having no appetite anymore?

This is going to be a wierd question, but have you had a bowel movement lately?? Certain medications can cause your GI functions to decrease, thus causing you to become constipated. If you become constipated, you can have side effects like nausea, vomiting, and fatigue because your body is not getting the nutrients it needs to function, so it tries to pull more nutrients from your stool, when there isn't any. (which makes your stool more firm and less easier to pass. I would check with your doctor to be sure though. It could be something more serious than that. Not trying to scare you, just giving a small piece of advice. Your health is too important to let it go. Good luck.