Dear Sir ..i Wanna To Say Smthng About Unsafe Sex

dear sir ..i wanna to say smthng about unsafe sex ..ago one month .....sir i doubt that i think hiv virus approach BT not sure ..so after sex ninth day test pcr dna test .......then show non detective ......BT i have doubt ...so plzz sir tell me that the report is true .......plzz give me advice what can i do???????