Don't rely on symptoms to diagnose hiv. They are very vague. Just get a 4th gen test at one month time. Good luck
Always use a condom. but a one time unprotected sex exposure is low risk at around 1%. Plus, this was a friend that you'd probably have heard if she had HIV. Not an unknown person that you know nothing about. HIV is harder to get than people realize. At 4 weeks, you can take a 4th generation Duo test to be sure you didn't get it but would expect it to be negative.