How accurate is hiv generation 4 antibodies/antigens test after 22 days of exposure?

It is good that it is negative. To be sure, you should repeat the test 6 weeks after exposure. HIV is only one of the STDs. A condom may not protect against HPV, Herpes, LGV, syphilis, pubic lice etc. It would be prudent to see your doctor for an evaluation. Visit this site for information: https://www.cdc.gov/std/default.htm Wish you good health!