Raman, I'm Poz and have been for 22 years now, and even if she was poz, I doubt you would contract it from her, if you only had traditional straight sex with her. You can't get it from kissing, even with mouth sores it's very hard to get that way, it's hard for a female to pass it to a male in just about every normal way of catching it except if using a needle.  I seriously doubt you are in any danger of getting it. but just be cautious and get tested anyway in about 6 months.