2 month long sore w red bumps back of throat. started days after sex w another man. went in month later 2 test 4 std but all neg. antibotics don't work?

Get screened for all: A complete std screen should include culture/molecular test for gonorrhea and chlamydia, viral test for herpes, blood test for syphilis and hiv. Make sure all of these were screened for. Warts (hpv) can also cause your symptoms and are another std. These can be tested for also. Please please please use condoms to protect yourself and your partners.