Nausea, lack of appetite, stools that float with mucous. gagging at times and suddenly tired at times on going for weeks?

Needs to be checked: Nausea,lack of appetite, and floating stools and tiredness needs to be checked by your doctor. Floating stools can be from eating high fat meal . But if it is persistent there is problem in GI Tract , like Pancreas, Gall Bladder or Liver. And it can cause deficiency of fat soluble vitamins. ie Vitamin A ,D,E&K.I suggest with your symptoms for few weeks you should consult your doctor and get check