Hey me and my girlfriend have been dating for 1 1/2 years she had an STD test before we got together and was clear of STD's and not HIV positive. Then she had sex with a few more guys, then we got together and have been dating ever since. 9 months into our relationship I got an STD test and came back clear of everything. Do I need her to have an STD test since she hasn't had one since we've been together or can we assume since we have been both faithful to each other for 15 months that we are both clear since I was clear at 9 months? I am sure she's been faithful to me and I have been faithful to her. PLEASE HELP!!!