Chances are high that she is just very hung over, or it could be from a spiked drink. I have seen people v* all day after a night of drinking. If I were you, in all honesty, I'd ask her how she feels. Find out if she has d* as well, does she have a fever? One tell tale sign of an sv* as far as I am concerned is the force associated with the v*. Ask her flat out if it is forceful or just normal. If it is the latter, and she has no d* or fever, then I'd say she doesn't have an sv*.

Also, always remember that, unless she has v* right next to you, or you've entered the bathroom immediately after her v* and flushed, and you've kept your hands clean and out of your mouth, then even IF she does have an sv*, you're safe. Just ask her a few things to ease your mind, keep your hands clean, and don't put them anywhere near your mouth.

I'd say you should go out with your friends, it will help take your mind off of it and help you get away from it for a while

All the best, hope it all works out for you.