Thanks for posting,
You are obviously presenting with signs of an infection probably of enteric (gut) origin. Many infections/diseases could manifest those symptoms including typhoid fever
, IBS, bacterial/viral/fungal gastroenteritis
, Malaria (if you are in an endemic zone or recently traveled from one).
What to do, visit a primary care
physician who can examine you, request blood tests and stool exams and provide appropriate treatment if the cause is determined. Your mucocutaneous manifestations (changes in finger and skin colors) are as a result of the presence of the infection.
You will require oral rehydration therapy to prevent dehydration
and electrolyte imbalance
hope you get well soon.