My cholesterol and liver enzymes are high and was feeling sick?

I had fever and vomiting about four weeks ago. I shed about 4 Kg. Now I am feeling well but I have had blood tests done and the results show my cholesterol and liver enzymes are pretty high. i also have swollen lymph nodes on neck near top of spine. What can this be? Just wondering if its cancer or some type of other disease or infection?

Age: 23
Male
Medications : None