Exposure date: oct 17, 2018. Received oral sex from a random person whose hiv status is unknown. During the act itself , I got scared of HIV and stopped. Very next day I felt very tierd and that continued for few days, followed by sore throat. HIV tests: 3rd gen Elisa test taken after 5 weeks, 5 months and 24 weeks. All came negative. Symptoms I have now: white tongue and occasional joint pain. Going through sever stress bcos of this fear. Are these test conclusive? What are the chances of getting hiv through oral sex? Should I repeat the test?