So my vag is really itchy (no yeast, no smell). I've bought new cotton panties (my old ones are too) and wash it with water. I use pads when I'm on my period and I change about every 3 hours. I don't use perfumes near the area. I don't have any stds. What could be the problem? Could it be sweating before, during, and after school? Or is my routine just wrong all together?