 [ Symptoms ] can unprotected sex for a minute cause hiv [ Disease ] the chance of transmission of human immunodeficiency virus hiv by single unprotected intercourse with a hiv positive person is 1200 to 11000 it is very low she may be negative so she might have asked it probably the test done was antibodies tests it is considered as conclusive after three months you can go for hiv 1 and 2 rna pcr polymerase chain reaction at this stage to allay your anxiety the symptoms are not specific and do not suggest hiv it may be due to any simple respiratory infection you can get it examined by an ent specialist to relieve your anxiety about throat infection for further information consult a hiv aids specialist online   > <link>