You may have renal stones as this entity cannot be excluded, however, your findings may be due to crystals in urine. Try drinking enough water everyday so that your urine is colorless and repeat the test in 3-4 months.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex.