Risk--yes and a duo test between 4 to 6 weeks will yield and excellent result,however you will have to follow up at 3 months for 100% gold.
Hi
If you have engaged in Unprotected anal / Vaginal sex it is risk for hiv, you need to be tested at 3 months to get your conclusive result
Acute syndrome will not appear within a week after exposure, symptoms dont tell anything about your hiv status
Oral sex not carries risk for hiv