You have tested conclusively negative so you were lucky. Any test after 3 months is conclusive. Symptoms aren't used to diagnose, so there is no need to study them before or now.
Congrats, you dodged the bullet, and as curfewx said, you do not have HIV, any HIV test is conclusive after 3 months, and remains conclusive whenever is done after 3 months mark.
Lesson learned, never ever unprotected again with anyone outside your mutually committed 100% monogamous relationship.
A real friend of a girl is mot her boy friend but it is a condom, that protects her from the risk