U GO GET CHECK IF U HAV IT THEY WILL ASK U WHO U BEEN WIT SHE WILL HAV 2 GET TESTED ALSO
http://www.webmd.com/genital-herpes/guide/genital-herpes-diagnosis
Found some info, this might be useful for you !
STD clinics are confidential. You can only test for oral herpes if you have sores at the time. If you do, they will take a swab/sample of the sore and test it to see if it contains the virus.