You need to be seen tomorrow for a swab/culture of your symptoms. Your GF needs to have a full STD screening as well based on the fact that she was raped.
As far as herpes being life-changing, it really isn't. It's very manageable in relationships (even if your partner is HSV negative) and is but a mere skin condition. You can read more about herpes here: http://www.ashastd.org/herpes/
thanks also there has been no redness in the area but the area has been swollen but now its going down
It may very well not be herpes (most symptoms appear within 2-20 days from exposure), but since neither of you know each others herpes status, you need to be seen.