Vomiting, chills and cold sweats, fever, sore throat. how long to wait before testing for strep?

No reason to wait-: Though most symptoms of an upper respiratory tract infection are caused by viruses, there is no reason for you to wait and have your doctor check you out for a strept infection. Just don't go the appointment expecting to get an antibiotic each time you suspect you need it- otherwise, you will end up with a multidrug resistant bacterial infection.