HIV has no specific signs or symptoms.
Is painless sore is early symptom
Symptoms will never tell you anything about HIV. Classic symptoms of ARS include high fever, sore throat and rash. But many people with ARS don't experience any symptom at all. Besides, symptoms of ARS can be caused by many other viruses, bacteria etc. So forget about symptoms. Only tests will tell you your status. Get tested at 6 weeks and 12 weeks. If 6 weeks test is negative, it will be really reassuring. Then get tested at 12 weeks for conclusive result.
You should have thought about the waiting period before you had unprotected sex.