Your activity of oral sex and protected vaginal sex are not a risk for getting hiv! Don't worry. The only risks for HIV are to have unprotected vaginal or anal sex or share IV needles to inject drugs. Your fever isn't related to HIV and symptoms are never used to diagnose hiv. You likely caught a cold or some type of common virus which is pretty normal to do. Then anxiety creeps in and makes you think your non risk sexual activity was to blame. It's not. You don't need to test or worry about this. Hope you feel better.