every month before my period, my vagina gets very itchy, usually around 10 days before the period starts. I have been tested for everything (yeast, bacterial vaginosis, syphillis, ghonnorhea, etc) and I'm negative for everything. Also, this month, before starting my period I had some discharge that looked like small tissue clumps and this period is a bit clotty. I have no idea what this can be but the itchiness was so bad it prevented me from sleeping last night