Your symptoms do not look like ARS, however do not focus on symptoms, they are confusing and misleading most of the time.
Since you had unprotected sex with someone of unknown health status, your risk is there which may not be significant but not Zero either.
The only way to rule out the possibility of the infection is the test. Suggest you to stay calm and go for 4th generation Duo (Antibody + Antigen) test after another 5 days. These tests are conclusive after 28 days. Collect your conclusive report and move on with your life. Next time, never ever unprotected with anyone outside your mutually committed long term monogamous relationship
HIV is never ever diagnosed by symptoms. Only by a test. You've had a legitimate risk by having unprotected vaginal sex and will need to test. Don't waste your time with testing early. At 28 days post exposure, take the Duo 4th gen test (pretty much what Diver said, guess I'm being redundant).