if you had a condom youdidn't have a risk
If you didn't have a condom you were at risk but you need to relax, although a risk it is considered a low risk as it was a one time encounter. your test at 9 weeks is a good indicator that you didn't get HIV but it isn't conclusive. You need to stop testing, stop googling and researching and relax. Stress and anxiety can cause these symptoms or a cold, flu can cause this. Most ppl who actually do get HIV don't even know it for years before they develop symptoms.
This is what you need to do, First Relax, second retest at the right time see below for testing time line only if your encounter was unprotected and since you have no idea it may be best just to get it done right
Gonorrhea, chlamydia, trick- 7 days post exposure
Syphilis- 6-8 weeks
HSV- 3 months
HIV- 3 months
Testing before is a good indicator but not conclusive.