Dear sir, chills
are not usual signs of hangover. It can be sign of abstinence crisis. But did u take some other substances except alcohol? Or you took tom much coffee or energy drinks? Secondly this can be urinary infection no matter u have fever
or not. You need to do complete blood tests and abdominal and urinary US, also microbiology tests(STD
and urinoculture) . And stop drinking of course.
Wish you good health