I had unprotected sex and got tested for by hiv1/2antibody screening(cmia) combo test on 100th day after exposure and it was non reactive.is it concl?

HIV testing: It is probably conclusive but there is going to always be a question until you are six months out from the exposure. Remember there is HIV nucleic acid testing that is 100% accurate 21 days after exposure. And, in the future if an exposure happens there is a way to prevent infection if treatment is started within 72 hours after the exposure.