Help??

My last period ended on October 17th. Had unprotected sex quite a few times within then and now. Still no sign of my period anywhere. I've taken many tests within the last two weeks or so. all are super negative. But now I have watery kind of creamy dishcharge with very light pink in it or a very small amount of brown in it.. And I have a sharp type of pain around my vaginal area only that only lasts about 10 minutes or so then goes away. I just wanna know what this may be or why if anyone knows? Thanks on advance if anyone could possibly help me.