There are some precautions a patient has to take before going for the confidential tests, which include a consultation at first with your doctor and discussing your symptoms so they can give you advice on which test you need to try to be open and clear with your doctor about your medical history and sexual activity otherwise it can cause complications afterward. Generally, doctors recommend avoiding any sexual activity, including oral, vaginal, or anal sex, for a few days at least before the test, and some tests even require fasting, which means you can’t eat or drink anything for a few hours before the test and also try to avoid urinating as if you are giving urine test.