Nausea and a bloated stomach could be due to some type of digestive disorder generally called "dyspepsia". Headache and tiredness are general symptoms and are present during many disorders. Experiencing a burning sensation while urinating could be due to a urinary tract infection, or "UTI". Proteins and blood in the urine support that diagnosis. But proteins and blood in the urine can be also due to kidneys failure. Creatinin and urea levels in the blood should be checked to exclude renal failure. You can consult your GP or a nephrologist for further tests.