If you have symptoms:
Your doctor will need to examine your genital area, take swabs from the penis or vagina, and a blood test. If you have had anal or oral sex, your doctor may also recommend testing these areas. If you have an ulcer in the mouth or genital area which could be caused by an STI, samples might be taken directly from the ulcer itself.
Testing for Syphilis, Hepatitis B, and HIV is conducted via a blood test, which looks for the presence of antibodies to each of these infections. It can take up to 12 weeks for these antibodies to be detected by a test and therefore, you may need to have a test after this period of time. Testing can only be conducted with your consent. Test results usually take about a week to come back.
Avoid having unsafe sex while you or your partner are taking the treatment, otherwise you could infect each other again. Do not drink alcohol while taking the treatment. The alcohol will reduce the effectiveness of the treatment. You might also forget about having safe sex while under the influence of alcohol.