Dear Doc, I would like to ask u, I am currently in CHINA, and due to the cold climate, I have cracked lips , recently I had kissed a girl whom Im seeing for a awhile and she too has cracked lips, but the problem is she did bite me hard on my lower lips until it swell , and in addition, I have weak gums (i.e. when I brush my teeth and gums I can taste or split out a little blood), am I at risk of HIV?